среда, 17 октября 2018 г.

A closer look at a couple of ancients from Hellenistic Anatolia

Not sure if anyone’s mentioned or noticed this already, but the two currently available genomes from Hellenistic Anatolia (samples MA2197 and MA2198 from Damgaard et al. 2018) pack an impressive amount of steppe ancestry. Moreover, one of these individuals also shows obvious admixture from Central Asia.
This isn’t particularly surprising, considering the well attested presence of Galatian Celts from deep in Europe and Cimmerians from the Eurasian steppe in Iron Age Anatolia. But it’s worthy of note, because it’s yet another example of ancient DNA correlating very strongly with archaeological data and historical records. Below are a couple qpAdm models for each of the two aforementioned Anatolians:

Anatolia_MLBA 0.429±0.073
Beaker_Hungary 0.571±0.073
chisq: 4.073
tail prob: 0.967727
Full output
Anatolia_MLBA 0.431±0.085
Hallstatt_Bylany 0.569±0.085
chisq: 4.056
tail prob: 0.968241
Full output

Anatolia_MLBA 0.469±0.037
Kangju 0.531±0.037
chisq: 12.091
tail prob: 0.356839
Full output
Anatolia_IA_MA2197 0.588±0.165
Cimmerian_Moldova 0.412±0.165
chisq: 11.657
tail prob: 0.390007
Full output

Hence, MA2197 can be modeled very successfully with more than 50% ancestry from a source closely related to the Bell Beakers from the Carpathian Basin and the presumably Celtic-speaking Hallstatt population of what is now Czechia. This almost certainly proves to me that MA2197 is largely of Galatian Celtic stock. The models for MA2198 aren’t quite as statistically sound, but they still work, and indeed suggest that this individual might be in large part of Cimmerian origin.
See also…
Focus on Hittite Anatolia
Cimmerians, Scythians and Sarmatians came from…
Central Asian admixture in Hallstatt Celts


Huge earthquake simulator getting upgrade to better simulate…

Huge earthquake simulator getting upgrade to better simulate deadly temblors http://www.geologypage.com/2018/10/huge-earthquake-simulator-getting-upgrade-to-better-simulate-deadly-temblors.html

Scientists find missing piece in glacier melt predictions…

Scientists find missing piece in glacier melt predictions http://www.geologypage.com/2018/10/scientists-find-missing-piece-in-glacier-melt-predictions.html

New understanding of Mekong River incision…

New understanding of Mekong River incision http://www.geologypage.com/2018/10/new-understanding-of-mekong-river-incision.html

Newly described fossils could help reveal why some dinos got so…

Newly described fossils could help reveal why some dinos got so big http://www.geologypage.com/2018/10/newly-described-fossils-could-help-reveal-why-some-dinos-got-so-big.html

Mammals cannot evolve fast enough to escape current extinction…

Mammals cannot evolve fast enough to escape current extinction crisis http://www.geologypage.com/2018/10/mammals-cannot-evolve-fast-enough-to-escape-current-extinction-crisis.html

Oldest evidence for animals…

Oldest evidence for animals http://www.geologypage.com/2018/10/oldest-evidence-for-animals.html

United Launch Alliance Successfully Launches AEHF-4 Mission

ULA – Atlas V / AEHF-4 Mission poster.

Oct. 17, 2018

Image above: Atlas V rocket carrying the fourth Advanced Extremely High Frequency (AEHF) mission launch.

A United Launch Alliance (ULA) Atlas V rocket carrying the fourth Advanced Extremely High Frequency (AEHF) mission for the U.S. Air Force lifted off from Space Launch Complex-41 on Oct. 17 at 12:15 a.m. EDT. The launch of AEHF-4 marks ULA’s 50th launch for the U.S. Air Force; ULA’s first Air Force mission was Space Test Program-1 (STP-1), launched March 8, 2007.

Atlas V AEHF-4 Launch Highlights

“ULA’s unparalleled record of successfully launching and placing payloads in orbit signifies our profound commitment to national defense,” said Tory Bruno, ULA president and CEO. “We remain the only launch provider capable of placing our customers’ payloads into any national security space orbit, anytime, which we’ve proudly exhibited through 50 launches for the U.S. Air Force.”

“Over the past 12 years, the men and women of ULA have reliably delivered dozens of Air Force payloads into orbit from GPS to WGS, and SBIRS to AEHF,” said Gen. Jay Raymond, commander of Air Force Space Command. “ULA’s unprecedented 100 percent launch success has directly contributed to our national security. Congratulations to the entire launch team on a successful 50th launch for the U.S. Air Force.”

AEHF-4 satellite

This mission launched aboard an Atlas V Evolved Expendable Launch Vehicle (EELV) 551 configuration vehicle, which includes a 5-meter large Payload Fairing (PLF) and stands at 197 ft. tall.

Producing more than two and a half million pounds of thrust at liftoff, the Atlas V 551 configuration rocket is the most powerful in the Atlas V fleet. The 551 rocket has launched groundbreaking missions for our nation—from the critically important Mobile User Objective System (MUOS) constellation to historic science missions including New Horizons, the first mission to Pluto, and the Juno mission to Jupiter.

The AEHF system, developed by Lockheed Martin, provides vastly improved global, survivable, protected communications capabilities for strategic command and tactical warfighters.

“Today’s launch exemplifies ULA’s ongoing commitment to 100 percent mission success,” said Gary Wentz, ULA vice president of Government and Commercial Programs.”My sincere thanks to the entire ULA team and our mission partners who made this, our 50th launch for the U.S. Air Force, possible.”

AEHF-4 is ULA’s eighth launch in 2018 and 131st successful launch since the company was formed in December 2006.

ULA’s next launch is the NROL-71 mission for the National Reconnaisance Office on a Delta IV Heavy rocket. The launch is scheduled for Nov. 29 from Space Launch Complex-6 at Vandenberg Air Force Base, California.

With more than a century of combined heritage, ULA is the world’s most experienced and reliable launch service provider. ULA has successfully delivered more than 130 satellites to orbit that provide Earth observation capabilities, enable global communications, unlock the mysteries of our solar system, and support life-saving technology.

For more information on ULA, visit the ULA website at https://www.ulalaunch.com/home

Images, Video, Text, Credits: United Launch Alliance (ULA)/CSC/USAF..

Greetings, Orbiter.chArchive link

2018 October 17 M15: Dense Globular Star Cluster Image Credit…

2018 October 17

M15: Dense Globular Star Cluster
Image Credit & Copyright: Bernhard Hubl (CEDIC)

Explanation: Messier 15 is an immense swarm of over 100,000 stars. A 13 billion year old relic of the early formative years of our galaxy it’s one of about 170 globular star clusters that still roam the halo of the Milky Way. Centered in this sharp telescopic view, M15 lies about 35,000 light years away toward the constellation Pegasus, well beyond the spiky foreground stars. Its diameter is about 200 light-years. But more than half its stars are packed into the central 10 light-years or so, one of the densest concentrations of stars known. Hubble-based measurements of the increasing velocities of M15’s central stars are evidence that a massive black hole resides at the center of dense globular cluster M15.

∞ Source: apod.nasa.gov/apod/ap181017.html

The Invisible Network: A New NASA Podcast

We sit on the precipice of a golden age of space exploration — a renaissance of space science and technology. Every day, our missions send millions of bits of data to Earth, unraveling long-held mysteries about the universe, our solar system and even our own planet. But what makes it all possible?

Today we debut a new, limited edition podcast called “The Invisible Network.” It brings you a side of NASA you may have never seen or heard of before — oft overlooked technologies crucial to spaceflight and humanity’s ambitions among the stars.


Communications is the vital link between Earth and space. A collection of far-flung ground stations enabled the Apollo missions: our first steps on the Moon; the Voyager missions: our first brushes with interstellar space; and supported the earliest space and Earth science missions, expanding our knowledge of the stars and of ourselves.


Today, our communications networks are vastly different than those that supported Apollo. Tomorrow’s networks will be even more advanced.

“The Invisible Network” explores technological innovations guiding us into the future. These seemingly un-sexy feats of engineering will allow us to return to the Moon, journey to Mars and venture ever-further into the unknown.


Artist’s rendering of the upcoming Orion missions.

Our podcast’s title, “The Invisible Network,” comes from author and former NASA engineer Sunny Tsiao’s book, “Read You Loud and Clear,” published in 2008. Tsiao notes that our communications and tracking programs are often described as “invisible.” Infrastructures, he writes, are seldom recognized, except when they fall short.

If our networks are invisible, perhaps it’s because they work so well.


We hope you’ll join us on our journey into The Invisible Network. Subscribe to the show and share us with a friend. For more information visit nasa.gov/invisible or nasa.gov/scan.

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.

Magnetic Fields May Be the Key to Black Hole Activity

Artist’s conception of the core of Cygnus A, including the dusty donut-shaped surroundings, called a torus, and jets launching from its center. Magnetic fields are illustrated trapping the dust in the torus. These magnetic fields could be helping power the black hole hidden in the galaxy’s core by confining the dust in the torus and keeping it close enough to be gobbled up by the hungry black hole. Credits: NASA/SOFIA/Lynette Cook

Two images of Cygnus A layered over each other to show the galaxy’s jets glowing with radio radiation (shown in red). Quiescent galaxies, like our own Milky Way, do not have jets like this, which may be related to magnetic fields. The yellow image shows background stars and the center of the galaxy shrouded in dust when observed with visible light. The area SOFIA observed is inside the small red dot in the center.  Credits: Optical Image: NASA/STSiC Radio Image: NSF/NRAO/AUI/VLA

Collimated jets provide astronomers with some of the most powerful evidence that a supermassive black hole lurks in the heart of most galaxies. Some of these black holes appear to be active, gobbling up material from their surroundings and launching jets at ultra-high speeds, while others are quiescent, even dormant. Why are some black holes feasting and others starving? Recent observations from the Stratospheric Observatory for Infrared Astronomy, or SOFIA, are shedding light on this question.

SOFIA data indicate that magnetic fields are trapping and confining dust near the center of the active galaxy, Cygnus A, and feeding material onto the supermassive black hole at its center.

The unified model, which attempts to explain the different properties ­of active galaxies, states that the core is surrounded by a donut-shaped dust cloud, called a torus. How this obscuring structure is created and sustained has never been clear, but these new results from SOFIA indicate that magnetic fields may be responsible for keeping the dust close enough to be devoured by the hungry black hole. In fact, one of the fundamental differences between active galaxies like Cygnus A and their less active cousins, like our own Milky Way, may be the presence or absence of a strong magnetic field around the black hole.

Although celestial magnetic fields are notoriously difficult to observe, astronomers have used polarized light — optical light from scattering and radio light from accelerating electrons — to study magnetic fields in galaxies. But optical wavelengths are too short and the radio wavelengths are too long to observe the torus directly. The infrared wavelengths observed by SOFIA are just right, allowing scientists, for the first time, to target and isolate the dusty torus.

SOFIA’s new instrument, the High-resolution Airborne Wideband Camera-plus (HAWC+), is especially sensitive to the infrared emission from aligned dust grains. This has proven to be a powerful technique to study magnetic fields and test a fundamental prediction of the unified model: the role of the dusty torus in the active-galaxy phenomena.

“It’s always exciting to discover something completely new,” noted Enrique Lopez-Rodriguez, a scientist at the SOFIA Science Center, and the lead author on the report of this new discovery. “These observations from HAWC+ are unique. They show us how infrared polarization can contribute to the study of galaxies.”

Recent observations of the heart of Cygnus A made with HAWC+ show infrared radiation dominated by a well-aligned dusty structure. Combining these results with archival data from the Herschel Space Observatory, the Hubble Space Telescope and the Gran Telescopio Canarias, the research team found that this powerful active galaxy, with its iconic large-scale jets, is able to confine the obscuring torus that feeds the supermassive black hole using a strong magnetic field.

The results of this study were published in the July 10th issue of The Astrophysical Journal Letters.

Cygnus A is in the perfect location to learn about the role magnetic fields play in confining the dusty torus and channeling material onto the supermassive black hole because it is the closest and most powerful active galaxy. More observations of different types of galaxies are necessary to get the full picture of how magnetic fields affect the evolution of the environment surrounding supermassive black holes. If, for example, HAWC+ reveals highly polarized infrared emission from the centers of active galaxies but not from quiescent galaxies, it would support the idea that magnetic fields regulate black hole feeding and reinforce astronomers’ confidence in the unified model of active galaxies.

SOFIA is a Boeing 747SP jetliner modified to carry a 106-inch diameter telescope. It is a joint project of NASA and the German Aerospace Center, DLR. NASA’s Ames Research Center in California’s Silicon Valley manages the SOFIA program, science and mission operations in cooperation with the Universities Space Research Association headquartered in Columbia, Maryland, and the German SOFIA Institute (DSI) at the University of Stuttgart. The aircraft is maintained and operated from NASA’s Armstrong Flight Research Center Hangar 703, in Palmdale, California.

Editor: Kassandra Bell

Archive link

HiPOD (16 October 2018): A Flow-Like Mound within an Equatorial…

HiPOD (16 October 2018): A Flow-Like Mound within an Equatorial Crater

   – The weird shape of this crater’s interior is likely due to what is called a “periglacial process,” relating to or denoting an area adjacent to a glacier or ice sheet or otherwise subject to repeated freezing and thawing. (263 km above the surface. Black and white is less than 5 km across; enhanced color is less than 1 km.)

NASA/JPL/University of Arizona

Captioned Image Spotlight: Colorful ImpactSome regions of Mars…

Captioned Image Spotlight: Colorful Impact

Some regions of Mars are not very colorful, but we can be surprised by local features. This image of an impact crater in the south Syrtis Major region was acquired as a “ride-along” with a CRISM observation, which targeted this location because that instrument’s team expected a distinct composition.

Our enhanced image reveals colors ranging from red to green to blue. These are infra-red shifted colors (infrared-red-blue) so it’s different than what we would see with our eyes.

NASA/JPL/University of Arizona

Counting Down to ICON’s Launch

NASA – Ionospheric Connection Explorer (ICON) logo.

Oct. 16, 2018

In October 2018, we’re launching the Ionospheric Connection Explorer, or ICON, to study Earth’s dynamic interface to space. Its combination of remote and in situ measurements will help scientists better understand this region — and how it changes in response to both space weather from above and terrestrial weather from below, a dynamic mix that can affect our communications, satellites and astronauts.

10-mile-per-hour sensitivity

Though the ICON spacecraft zooms around Earth at upwards of 14,000 miles per hour, its wind-measuring instrument MIGHTI can detect changes in wind speed smaller than 10 miles per hour. MIGHTI makes use of the Doppler effect — the same phenomenon that makes an ambulance siren change pitch as it passes you — and measures the tiny shifts in color caused by the motion of glowing gases in the upper atmosphere, which reveals their speed and direction.

97-minute orbital period

ICON circles Earth in just over an hour and a half, completing nearly 15 orbits per day. Its orbit is inclined by 27 degrees, so over time, its measurements will completely cover its zone of interest near the equator.

Animation above: Visualization of ICON’s orbit. Animation Credits: NASA’s Scientific Visualization Studio.

8 1/3-foot solar panel

ICON doesn’t carry any onboard fuel. Instead, its single solar panel — measuring about 100 inches long and 33 inches wide, a little bit bigger than a standard door — produces power for the spacecraft. In science mode, ICON draws about 209-265 Watts of power.

7 years of teamwork

The idea for ICON was selected for further study in 2011, and the team has been hard at work ever since.

ICON – Ionospheric Connection Explorer. Image Credit: NASA

634 pounds

How much does good science weigh? In ICON’s case, about as much as vending machine. The observatory weighs 634 pounds altogether.

5 snapshots per minute from FUV

Because ICON travels so fast, its Far Ultraviolet instrument takes eight snapshots per second of passing structures. This avoids blurring the images and captures the fine detail scientists need. But ICON’s bandwidth only allows FUV to send 5 images per minute, so the instrument uses a de-blurring technique called time-delay integration to combine 12 seconds’ worth of data into a single image.

4 types of instruments collecting data in tandem

ICON carries four distinct instruments to study Earth’s boundary to space.

– 2 MIGHTIs (Michelson Interferometer for Global High-resolution Thermospheric Imaging): Built by the Naval Research Laboratory in Washington, D.C., to observe the temperature and speed of the neutral atmosphere. There are two identical MIGHTI instruments onboard ICON.
– 2 IVMs (Ion Velocity Meter): Built by the University of Texas at Dallas to observe the speed of the charged particle motions, in response to the push of the high-altitude winds and the electric fields they generate. ICON carries two, and they are the missions only in situ instruments. 
– EUV (Extreme Ultra-Violet instrument): Built by the University of California at Berkeley to captures images of oxygen glowing in the upper atmosphere, in order to measure the height and density of the daytime ionosphere.
– FUV (Far Ultra-Violet instrument): Built by UC Berkeley to capture images of the upper atmosphere in the far ultraviolet light range. At night, FUV measures the density of the ionosphere, tracking how it responds to weather in the lower atmosphere. During the day, FUV measures changes in the chemistry of the upper atmosphere — the source for the charged gases found higher up in space.

360 miles above Earth

ICON orbits about 360 miles above Earth, near the upper reaches of the ionosphere — the region of Earth’s atmosphere populated by electrically-charged particles. From this vantage point, ICON combines remote measurements looking down along with direct measurements of the material flowing around it to connect changes throughout this region.

Image above: NASA’s ICON mission will orbit above the upper atmosphere, through the bottom edge of near-Earth space. Here it will be able to observe how interactions between terrestrial weather and a layer of charged particles called the ionosphere creates changes in the space environment — including bright swaths of color in the atmosphere called airglow. Image Credits: NASA’s Goddard Space Flight Center/ICON.

2 missions working together

NASA’s GOLD mission — short for Global-scale Observations of the Limb and Disk — launched aboard a commercial communications satellite on Jan. 25, 2018. From its vantage point in geostationary orbit over Brazil, GOLD gets a full-disk view of the same region of space that ICON studies, helping scientists connect the big picture with the details.

1 gigabit of data per day

Together, ICON’s instruments produce and downlink about 1 gigabit of data per day — about 125 megabytes. This adds up to about 1 gigabyte per week. ICON produces 10 different data products, ranging from measurements of wind speeds and ionospheric density to more complex models, that will help scientists shed new light on this ever-changing region.

ICON (Ionospheric Connection Explorer): http://www.nasa.gov/icon

Animation (mentioned), Images (mentioned), Text, Credits: NASA/Rob Garner/Goddard Space Flight Center, by Sarah Frazier.

Greetings, Orbiter.chArchive link

CASC – BeiDou-3M satellites launch Success

BeiDou Navigation Satellite System logo.

Oct. 16, 2018

Long March 3B carrying Beidou-3M13 and Beidou-3M14 launch. Image Credit: CASC/Xinchua

A Long March-3B rocket launched another pair of BeiDou-3 navigation satellites from the Xichang Satellite Launch Center, Sichuan Province, southwest China, on 15 October 2018, at 04:23 UTC (12:23 local time). 

BeiDou-3M satellites launch- 15 October 2018

According to official sources, the two satellites, BeiDou-3 MEO-15 (M15) and BeiDou-3 MEO-16 (M16) entered the scheduled orbit after more than three hours. 

Artist’s view of a BeiDou-3 satellite by J. Huart

The satellites are the 39th and 40th in the BeiDou Navigation Satellite System, respectively the 15th and 16th for the BeiDou-3 system. So far, China has launched a total of 40 Beidou satellites, and 11 more will be launched in the next two years, in an effort to complete the global navigation network into Medium Earth Orbit.

The Chinese Navigation Constellation. Image Credit: Beidou

Related article:

Long March 3B launches Beidou satellites:

For more information about Beidou navigation system: http://www.beidou.gov.cn/

For more information about China Aerospace Science and Technology Corporation (CASC): http://english.spacechina.com/n16421/index.html

Images (mentioned), Video, Text, Credits: CASC/SciNews.

Greetings, Orbiter.ch

Archive link

Scientists to Debate Landing Site for Next Mars Rover

NASA – Mars Rover 2020 logo.

Oct. 16, 2018

Image above: This artist’s rendition depicts NASA’s Mars 2020 rover studying a Mars rock outrcrop. Image Credits: NASA/JPL-Caltech.

Hundreds of scientists and Mars-exploration enthusiasts will convene in a hotel ballroom just north of Los Angeles later this week to present, discuss and deliberate the future landing site for NASA’s next Red Planet rover – Mars 2020. The three-day workshop is the fourth and final in a series designed to ensure NASA receives the broadest range of data and opinion from the scientific community before the agency chooses where to send the new rover.

The Mars 2020 mission is tasked with not only seeking signs of habitable conditions on Mars in the ancient past, but also searching for signs of past microbial life. The landing site for Mars 2020 is of great interest to the planetary community because, among the rover’s new medley of science gear for surface exploration, it carries a sample system that will collect rock and soil samples and set them aside in a “cache” on the surface of Mars. A future mission could potentially return these samples to Earth. The next Mars landing, after Mars 2020, could very well be a vehicle that would retrieve these Mars 2020 samples.

Mars in a Minute: How do you choose a landing site?

Video above: So, you want to study Mars with a lander or rover – but where exactly do you send it? Learn how scientists and engineers tackle the question of where to land on Mars in this 60-second video and by visiting mars.nasa.gov. Video Credits: NASA/JPL.

“The Mars 2020 landing site could set the stage for Mars exploration for the next decade,” said Thomas Zurbuchen, Associate Administrator of the Science Mission Directorate at NASA Headquarters in Washington. “I’m looking forward to the spirited debate and critical input from the science and engineering community. Whichever landing site is ultimately chosen, it may hold the very first batch of Mars soil that humans touch.”

The workshop begins with an opening address by the lead scientist for NASA’s Mars Exploration Program, Michael Meyer. After project status, engineering constraints, and site-assessment criteria are discussed come the presentations. Fair warning: Expect plenty of technical jargon as terms like biosignatures, geochemical conditions, impact deformation, biogenetic potential, olivine lithologies, and serpentinization and its astrobiological potential roll off presenters’ tongues.

“We have been doing these workshops in support of 2020 landing site selection since 2014,” said Matt Golombek, cochair of the Mars Landing Site Steering Committee from NASA’s Jet Propulsion Laboratory in Pasadena, California. “At our first workshop, we started with about 30 candidate landing sites, and after additional orbital imaging and a second landing site workshop, we had a recommendation of eight sites to move forward for further evaluation. There were so many great locations to choose from, the whittling-down process was tough. This time around, with four finalists, it promises to be even more difficult. Each site has its own intriguing science potential and knowledgeable advocates.”

Champions for four landing options will take their turn at the podium, presenting and defending their favorite parcel on the Red Planet. It is one more site than was expected after the completion of the third workshop, in 2017, where three locations on Mars were recommended for consideration – Columbia Hills, Jezero Crater and Northeast Syrtis.

“At the end of the workshop in February of 2017, there were only three sites on our radar as potential Mars 2020 landing locations,” said Ken Farley, project scientist of Mars 2020 at JPL. “But in the ensuing months, a proposal came forward for a landing site that is in between Jezero and Northeast Syrtis. Our goal is to get to the right site that provides the maximum science for Mars 2020, and this new site – dubbed ‘Midway’ – was viewed as worthy of being included in the discussions.”

On the final day, after all presentations have concluded, workshop participants will weigh the positives and negatives of each site. The results of these deliberations will be provided to the Mars 2020 Project, which will incorporate them into a recommendation to NASA Headquarters in Washington, where final selection will be made. The announcement of the Mars 2020 landing site is expected to come by the end of the year.

“I have attended all the workshops so far, and none have disappointed when it comes to intelligent advocation and lively debate,” said Farley. “But this is what science is all about – the cogent and respectable exchange of ideas. The passion of the participants shows just how much they care about Mars exploration. They know they are playing a key role in the process, and they know how important the landing site for Mars 2020 will be.”

Mars 2020 will launch on a United Launch Alliance (ULA) Atlas V rocket from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida in July 2020. It is expected to reach Mars in February 2021.

The rover will conduct geological assessments of its landing site on Mars, determine the habitability of the environment, search for signs of ancient Martian life, and assess natural resources and hazards for future human explorers. Scientists will use the instruments aboard the rover to identify and collect samples of rock and soil, encase them in sealed tubes and leave them on the planet’s surface for potential return to Earth on a future Mars mission.

The Mars 2020 Project at JPL in Pasadena, California, manages rover development for the Science Mission Directorate at NASA Headquarters in Washington. NASA’s Launch Services Program, based at the agency’s Kennedy Space Center in Florida, is responsible for launch management.

For more information on the workshop, go to: https://marsnext.jpl.nasa.gov/workshops/wkshp_2018_10.cfm

For information on how to listen in to workshop presentations, go to: https://ac.arc.nasa.gov/landing-site-workshop/

For more information on Mars 2020, go to: https://mars.nasa.gov/mars2020/

For more information about NASA’s Mars missions, go to: https://mars.nasa.gov

Image (mentioned), Video (mentioned), Text, Credits: NASA/Jon Nelson/JPL/DC Agle.

Best regards, Orbiter.chArchive link

Another Poetry Pamphlet on its way…

Another Poetry Pamphlet on its way…

Source link


Полет на параплане с обрыва на мысу Куяльницкого лимана, соленого озера. Экстремальный развлекательный полет проводится для любителей. ...