суббота, 2 февраля 2019 г.

Agate “Looks like face” 😍 | #Geology #GeologyPage…

Agate “Looks like face” 😍 | #Geology #GeologyPage #Agate

Credit: Don Windeler

Geology Page



Meteorite hits Cuba with huge sonic boom

Caught on Weather Radar

The US National Weather Service twitted that its radar may have detected a huge meteor (a fireball) near Viñales, Cuba around 1:21 pm last Friday (February 1st 2019).

Residents in Viñales, Cuba, heard a “large explosion” around this time on Friday afternoon. The explosion has now been confirmed to be from a fireball that produced a meteorite fall. The explosion can be heard in the following video shared by Viñales area resident Juan Alberto Pérez Pozo:

Only 10 witness report so far

The AMS has received only 10 reports from Florida so far about this event.

If you witnessed this event and/or if you have a video or a photo of this event, please

Submit an Official Fireball Report

If you want to learn more about Fireballs: read our Fireball FAQ.

The map below shows the first estimated ground trajectory of the fireball obtained from these witness reports as well as an image obtained from the GOES-16 NOAA Satellite used for the detection of meteoroid impacts by Peter Jenniskens’ team (SETI Institute).

AMS Event #513-2019 – Witness location, estimated ground trajectory and GOES-16 Detection

Meteorite Found

Several pieces of the meteorite resulting of the huge fireball has already been found. Twitter user, Fátima Rivera Amador shared the following photos of her finds:

February Meteorites?

This paragraph has been written by AMS’s Operation Manager, Mike Hankey.

Late January and February are known to have an increased rates of meteorite dropping fireballs. Is this a missed perception or reality? If we look back over the last 10 years of meteorite falls, there have been a total of 77 falls from the end of 2009 to the end of 2018. An even distribution of these events over each month would result in .6 meteorites per month/year or 6 meteorites for each month over the last 10 years.

Between January 2009 and January 2018, 9 known meteorites have fallen in the month of February. If we extend to a 6 week period of Jan 15 to Feb 27, the total is 14 meteorites which is 1.5x higher than the even per month distribution.

Date Fall Location
Feb 1, 2019 Viñales, Cuba
Jan 16, 2018 Hamburg, MI, USA
Feb 16, 2017 San Pedro de Urabá, Columbia
Jan 24, 2016 Osceola, FL, USA
Feb 18, 2016 Mount Blanco, TX, USA
Feb 6, 2016 Ejby, Denmark
Feb 27, 2014 Kuresoi, Kenya
Feb 15, 2013 Chelyabinsk, Russia
Feb 11, 2012 Xining, China
Feb 4, 2011 Križevci, Croatia
Feb 28, 2010 Kosice, Slovakia
Jan 18, 2010 Lorton, VA, USA
Feb 15, 2009 Ash Creek, TX, USA
Jan 17, 2009 Maribo, Denmark

The even distribution of meteorites per week/per year would be .14 meteorite per week of the year or 1.4 meteorites per week over 10 years or 8.4 meteorites in 10 years. Over the last 10 years, the 6 week period of late Jan into February has produced 14 meteorites, which is 1.75x higher than an even distribution.

Maybe there is something to these February meteorites after all.

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Wulfenite | #Geology #GeologyPage #Mineral Locality: Defiance…

Wulfenite | #Geology #GeologyPage #Mineral

Locality: Defiance Mine, Gleeson, Arizona, USA

Dimensions: 8.0 × 5.2 × 5.2 cm

Photo Copyright © Crystal Classics

Geology Page



2019 February 2 LDN 1622: Dark Nebula in Orion Image Credit…

2019 February 2

LDN 1622: Dark Nebula in Orion
Image Credit & Copyright: Tapio Lahtinen

Explanation: The silhouette of an intriguing dark nebula inhabits this cosmic scene. Lynds’ Dark Nebula (LDN) 1622 appears against a faint background of glowing hydrogen gas only easily seen in long telescopic exposures of the region. LDN 1622 lies near the plane of our Milky Way Galaxy, close on the sky to Barnard’s Loop, a large cloud surrounding the rich complex of emission nebulae found in the Belt and Sword of Orion. But the obscuring dust of LDN 1622 is thought to be much closer than Orion’s more famous nebulae, perhaps only 500 light-years away. At that distance, this 1 degree wide field of view would span less than 10 light-years. Its foreboding appearance lends this dark expanse a popular name, the Boogeyman Nebula.

∞ Source: apod.nasa.gov/apod/ap190202.html

Meteor Activity Outlook for February 2-8, 2019

Greg Johnson captured this fireball from Hansville, WA on the evening of January 25, 2018, at 5:35 UT (on January 26). Greg uses a series of cameras to record activity toward the north of his location and shares his experiences on his website and blog located at: http://skunkbayweather.com/

February offers the meteor observer in the northern hemisphere a couple of weak showers plus falling sporadic rates. This may not seem too exiting but you never know when surprises are in store. An errant earthgrazer from the Centaurid complex may shoot northward. Better yet, a bright fireball may light up the sky. February is the start of the evening fireball season, when an abundance of fireballs seem to occur. This lasts well into April as seen from the northern hemisphere. Sporadic rates are near maximum for those viewing from the Southern hemisphere. There are no strong showers this month but sporadic rates are well in excess of 10 per hour as seen from mid-southern latitudes.

During this period the moon will reach its new phase on Monday February 4th. At this time the moon will be located near the sun and will be invisible at night. As the week progresses the waxing crescent moon will enter the evening sky. It will be so thin and will set early that it will not interfere with the viewing of meteor activity during this period. Hourly meteor rates for evening observers this week is near 3 as seen from mid-northern latitudes (45N) and 4 as seen from tropical southern locations (25S). For morning observers the estimated total hourly rates should be near 12 as seen from mid-northern latitudes and 13 from the southern tropics. The actual rates will also depend on factors such as personal light and motion perception, local weather conditions, alertness and experience in watching meteor activity. Note that the hourly rates listed below are estimates as viewed from dark sky sites away from urban light sources. Observers viewing from urban areas will see less activity as only the brighter meteors will be visible from such locations.

The radiant (the area of the sky where meteors appear to shoot from) positions and rates listed below are exact for Saturday night/Sunday morning February 2/3. These positions do not change greatly day to day so the listed coordinates may be used during this entire period. Most star atlases (available at science stores and planetariums) will provide maps with grid lines of the celestial coordinates so that you may find out exactly where these positions are located in the sky. A planisphere or computer planetarium program is also useful in showing the sky at any time of night on any date of the year. Activity from each radiant is best seen when it is positioned highest in the sky, either due north or south along the meridian, depending on your latitude. It must be remembered that meteor activity is rarely seen at the radiant position. Rather they shoot outwards from the radiant so it is best to center your field of view so that the radiant lies near the edge and not the center. Viewing there will allow you to easily trace the path of each meteor back to the radiant (if it is a shower member) or in another direction if it is a sporadic. Meteor activity is not seen from radiants that are located far below the horizon. The positions below are listed in a west to east manner in order of right ascension (celestial longitude). The positions listed first are located further west therefore are accessible earlier in the night while those listed further down the list rise later in the night.

Radiant Positions at 7:00pm Local Standard Time

Radiant Positions at 12:00am Local Standard Time

Radiant Positions at 5:00am Local Standard Time

These sources of meteoric activity are expected to be active this week.

The center of the large Anthelion (ANT) radiant is currently located at 09:48 (147) +13. This position lies in western Leo, 4 degrees northwest of the 1st magnitude star known as Regulus (alpha Leonis). Due to the large size of this radiant, Anthelion activity may also appear from Cancer, northwestern Hydra, and Sextans as well as Leo. This radiant is best placed near 0100 local standard time (LST), when it lies on the meridian and is located highest in the sky. Rates at this time should be near 2 per hour as seen from the northern hemisphere and 1 per hour from south of the equator. With an entry velocity of 30 km/sec., the average Anthelion meteor would be of slow velocity.

The alpha Antliids (AAN) should be active from a radiant located near 10:36 (159) -10. This position actually lies in southern Sextans, 4 degrees northeast of the 4th magnitude star known as lambda Hydrae. I’m not certain how this stream was named as it the radiant lies a good 20 degrees north of the Antlia border. Perhaps when activity was first noticed from this source the radiant was incorrectly determined? This radiant is best placed near 0200 LST, when it lies on the meridian and is located highest in the sky. Rates are expected to be near 1 per hour no matter your location. With an entry velocity of 45 km/sec., the average meteor from this source would be of medium velocity.

The February Epsilon Virginids (FEV) were discovered by Kathryn Steakly & Dr. Peter Jenniskens using data from CAMS and SonotaCo. This shower is active from January 29-February 9, with maximum activity occurring on February 3rd. The radiant is currently located at 13:22 (200) +11, which places it in northern Virgo, 3 degrees east of the 3rd magnitude star known as Vindemiatrix (Epsilon Virginis). These meteors would be best seen near 0400 LST when the radiant lies highest above the horizon. Rates are expected to be near 1 per hour during the last dark hour before dawn. These meteors are equally well seen from either hemisphere. These meteors encounter the atmosphere at 64 km/sec., which would produce mostly swift meteors.

The alpha Centaurids (ACE) are active from February 2-19, with maximum activity occurring on February 8. The radiant is currently located at 13:38 (205) -57. This position lies in southeastern Centaurus, 2 degrees south of the 2nd magnitude star known as epsilon Centauri. Due to the southern declination of this radiant, these meteors are not well seen in the northern hemisphere. Current rates are expected to be near 1 for those in the southern hemisphere and less than 1 for those located north of the equator. These meteors are best seen near 0500 LST when the radiant lies highest above the horizon. At 56 km/sec. the alpha Centaurids would produce mostly swift meteors.

The pi Hydrids (PIH) were discovered in Dr. Peter Jenniskens and mentioned in his book Meteor Showers and their Parent Comets. Studies of the IMO video database by Sirko Molau and Juergen Rendtel confirmed the existence of this shower. These meteors are active from February 4-15, which maximum activity occurring on the 6th. At maximum the radiant is located at 14:00 (210) -21. This area of the sky is located in extreme southeastern Virgo, 6 degrees northwest of the 3rd magnitude star known as Pi Hydrae. These meteors are best seen near 0500 LST when the radiant lies highest above the horizon. Rates are expected to remain below 1, even at maximum activity. These meteors are visible over most of the Earth, with the southern hemisphere having slightly better viewing conditions. At 55 km/sec. the Pi Hydrids would produce mostly swift meteors.

The February Eta Draconids (FED) were discovered by Dr. Peter Jenniskens and Peter Gural using data from the first CAMS network in northern California. These meteors are active on only 3 nights, February 3-5. The maximum occurs on February 4 when the radiant is located at 15:59 (240) +61. This position lies in central Draco, 3 degrees west of the 3rd magnitude star known as Eta Draconis. These meteors are best seen during the last dark hour before dawn when the radiant lies highest above the horizon in a dark sky. Expected rates would be less than 1 per hour, even at maximum. These meteors are difficult to see from the southern tropics and impossible to see from latitudes south of 30S. At 35 km/sec. the February Eta Draconids produce mostly medium-slow meteors.

As seen from the mid-northern hemisphere (45N) one would expect to see approximately 7 sporadic meteors per hour during the last hour before dawn as seen from rural observing sites. Evening rates would be near 2 per hour. As seen from the tropical southern latitudes (25S), morning rates would also be near 10 per hour as seen from rural observing sites and 3 per hour during the evening hours. Locations between these two extremes would see activity between the listed figures.

RA (RA in Deg.) DEC Km/Sec Local Standard Time North-South
Anthelion (ANT) 09:48 (147) +13 30 01:00 2 – 1 II
alpha Antliids (AAN) Feb 01 10:36 (159) -10 45 02:00 1 – 1 IV
February Epsilon Virginids (FEV) Feb 03 13:22 (200) +11 64 04:00 1 – 1 IV
alpha Centaurids (ACE) Feb 08 13:38 (205) -57 59 04:00 1 – <1 II
pi Hydrids (PIH) Feb 06 14:00 (210) -21 55 05:00 <1 – <1 IV
February eta Draconids (FED ) Feb 04 15:59 (240) +61 35 07:00 <1 – <1 IV

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Crew Wraps Up Biomedical Studies; Films Station in Virtual Reality

ISS – Expedition 58 Mission patch.

February 1, 2019

A pair of biomedical experiments are wrapping up today aboard the International Space Station as the Expedition 58 crew began its weekend. The orbital residents are also filming a virtual reality (VR) experience and working on plumbing and life support hardware.

Image above: Astronaut Anne McClain is pictured wearing a sensor on her forehead that is collecting data to determine how an astronaut’s “biological clock” changes during long-duration spaceflight. Image Credit: NASA.

Anne McClain of NASA removed sensors from her head and chest this morning that collected data about her circadian rhythm, or “biological clock,” and how it is adapting off Earth. Canadian Space Agency astronaut David Saint-Jacques stowed the wearable Bio-Monitor hardware that monitors an astronaut’s vital signs during normal activities with minimum interference.

McClain then set up a VR camera to film a first-person’s view aboard the orbital lab in an immersive, cinematic experience. She finished the workday with Saint-Jacques on orbital plumbing work in the Tranquility module.

International Space Station (ISS) flying over the Earth. Animation Credit: NASA

The Combustion Integrated Rack received more attention today as Saint-Jacques replaced hardware in the fuel and flame research platform. He also assisted McClain with the VR camera installation, set up audio equipment and filmed an introduction.

Commander Oleg Kononenko also up video gear today in Japan’s Kibo lab module and held a conference with Russian students and educators. The veteran cosmonaut then spent part of the afternoon conducting maintenance on life support equipment in the station’s Russian segment.

Related links:

Expedition 58: https://www.nasa.gov/mission_pages/station/expeditions/expedition58/index.html

Circadian rhythm: https://www.nasa.gov/mission_pages/station/research/experiments/explorer/Investigation.html?#id=869

Bio-Monitor: https://www.nasa.gov/mission_pages/station/research/experiments/explorer/Facility.html?#id=7392

VR camera: https://www.nasa.gov/mission_pages/station/research/experiments/explorer/Investigation.html?#id=7877

Tranquility module: https://www.nasa.gov/mission_pages/station/structure/elements/tranquility/

Combustion Integrated Rack: https://www.nasa.gov/mission_pages/station/research/experiments/explorer/Facility.html?#id=317

Kibo lab module: https://www.nasa.gov/mission_pages/station/structure/elements/japan-kibo-laboratory

Space Station Research and Technology: https://www.nasa.gov/mission_pages/station/research/index.html

International Space Station (ISS): https://www.nasa.gov/mission_pages/station/main/index.html

Image (mentioned), Animation (mentioned), Text, Credits: NASA/Mark Garcia.

Best regards, Orbiter.chArchive link

What’s next for NASA? In 2019, we’re once again preparing…

What’s next for NASA? In 2019, we’re once again preparing for human missions to the Moon. We’re keeping the promise by developing new systems and spacecraft, making innovations in flight and technology, living and doing science on the International Space Station, and delivering images and discoveries from our home planet, our solar system and beyond.

Check out What’s Next for NASA: https://www.nasa.gov/next

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

In a Wingbeat Both beautiful and practical, the dazzling wings…

In a Wingbeat

Both beautiful and practical, the dazzling wings of Morpho butterflies have already inspired many innovations, from self-cleaning surfaces to solar technologies, and could now find a new biomedical application. The secret of their stunning iridescence lies in structural coloration, produced by the interaction of light with complex nanoscale ridges on their wing scales. Scientists recently harnessed these remarkable surfaces to develop a biosensor monitoring the behaviour of heart muscle cells, or cardiomyocytes. Essentially, they found that cardiomyocytes could be cultured on modified wings of Morpho menelaus (pictured), and recover their intrinsic beating rhythm, expanding and contracting. These contractions cause the wings to bend, changing the angle at which light hits the nanostructures on their scales, so altering the colour of the wings. As these colour changes will reveal any variation in the cells’ behaviour, this system could provide a simple tool to test the responses of cardiomyocytes to different drugs.

Written by Emmanuelle Briolat

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Adamite | #Geology #GeologyPage #Mineral Location: Ojuela Mine,…

Adamite | #Geology #GeologyPage #Mineral

Location: Ojuela Mine, Mapimi, Durango, Mexico

Size: 5.5 x 4.0 x 2.5 cm (miniature)

Photo Copyright © Weinrich Minerals

Geology Page



Reconstructed Roman Fort, Vicus and Granary Foundations, Deansgate, Manchester, 30.1.19.

Reconstructed Roman Fort, Vicus and Granary Foundations, Deansgate, Manchester, 30.1.19.

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https://t.co/hvL60wwELQ — XissUFOtoday Space (@xufospace) August 3, 2021 Жаждущий ежик наслаждается пресной водой после нескольких дней в о...