суббота, 23 марта 2019 г.

NASA Instruments Image Fireball over Bering Sea

NASA – EOS Terra Mission patch.

March 23, 2019

On Dec. 18, 2018, a large “fireball” – the term used for exceptionally bright meteors that are visible over a wide area – exploded about 16 miles (26 kilometers) above the Bering Sea. The explosion unleashed an estimated 173 kilotons of energy, or more than 10 times the energy of the atomic bomb blast over Hiroshima during World War II.

Animation above: This image sequence from the MISR instrument, aboard the Terra satellite, was taken a few minutes after a meteor exploded over the Bering Sea on Dec. 18. 2018. It shows the shadow of the meteor’s trail, and the orange-tinted cloud it left behind. Animation Credits: NASA/GSFC/LaRC/JPL-Caltech, MISR Team.

Two NASA instruments aboard the Terra satellite captured images of the remnants of the large meteor. The image sequence shows views from five of nine cameras on the Multi-angle Imaging SpectroRadiometer (MISR) instrument taken at 23:55 Coordinated Universal Time (UTC), a few minutes after the event. The shadow of the meteor’s trail through Earth’s atmosphere, cast on the cloud tops and elongated by the low sun angle, is to the northwest. The orange-tinted cloud that the fireball left behind by super-heating the air it passed through can be seen below and to the right of the GIF’s center.

The still image, captured by the Moderate Resolution Imaging SpectroRadiometer (MODIS) instrument, is a true-color image showing the remnants of the meteor’s passage, seen as a dark shadow cast on thick, white clouds. MODIS captured the image at 23:50 UTC.

Image above: NASA’s MODIS instrument, aboard the Terra satellite, captured this true-color image showing the remnants of a meteor’s passage, seen as a dark shadow cast on thick, white clouds on Dec. 18, 2018. Image Credits: NASA GSFC.

The Dec. 18 fireball was the most powerful meteor to be observed since 2013; however, given its altitude and the remote area over which it occurred, the object posed no threat to anyone on the ground. Fireball events are actually fairly common and are recorded in the NASA Center for Near Earth Object Studies database.

Artist’s concept of Terra satellite. Image Credits: NASA/JPL

The Terra spacecraft was launched in 1999 and is managed by NASA’s Goddard Space Flight Center in Greenbelt, Maryland. The MISR instrument was built and is managed by NASA’s Jet Propulsion Laboratory in Pasadena, California, for NASA’s Science Mission Directorate in Washington. JPL is a division of Caltech. The MISR data were obtained from the NASA Langley Research Center Atmospheric Science Data Center in Hampton, Virginia. The MODIS instrument is managed by NASA’s Goddard Space Flight Center.

Related article:

An meteor explosion like ten times Hiroshima goes unnoticed

More information about EOS Terra and MISR and MODIS is available at the following site(s):

EOS Terra Satellite: https://terra.nasa.gov/



NASA Center for Near Earth Object Studies database: https://cneos.jpl.nasa.gov/fireballs

Images (mentioned), Animation (mentioned), Text, Credits: NASA/JPL/Esprit Smith/GSFC/Patrick Lynch.

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Volcanic ash particles under the microscope…

Volcanic ash particles under the microscope http://www.geologypage.com/2019/03/volcanic-ash-particles-under-the-microscope.html

Half-a-billion-year-old fossil reveals the origins of comb…

Half-a-billion-year-old fossil reveals the origins of comb jellies http://www.geologypage.com/2019/03/half-a-billion-year-old-fossil-reveals-the-origins-of-comb-jellies.html

‘Rocks and Roots’, Waterfoot, Rossendale, 23.3.19.

‘Rocks and Roots’, Waterfoot, Rossendale, 23.3.19.

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2019 March 23 Four Towers and the Equinox Moon Image Credit…

2019 March 23

Four Towers and the Equinox Moon
Image Credit & Copyright: Javier Martinez Moran

Explanation: The first Full Moon of northern spring rises behind four distant towers in this telescopic view. In an image captured from some 40 kilometers west of the city of Madrid, this moonrise also represents a near coincidence of the full lunar phase with lunar perigee and the March equinox. Close to the horizon, the Full Moon’s strangely rippled and distorted shape has more to do with the long sight-line through a layered atmosphere, though. Tantalizing visible effects of the substantial atmospheric refraction include the appearance of a thin floating sliver just above the lunar disk. The remarkable optical mirage is related to the more commonly witnessed green flash of the setting Sun.

∞ Source: apod.nasa.gov/apod/ap190323.html

Celebrating Women’s History Month: Most Recent Female Astronauts

For Women’s History Month, NASA and the International Space Station celebrate the women who conduct science aboard the orbiting lab. As of March 2019, 63 women have flown in space, including cosmonauts, astronauts, payload specialists, and space station participants. The first woman in space was Russian cosmonaut Valentina Tereshkova who flew on Vostok 6 on June 16, 1963. The first American woman in space, Sally Ride, flew aboard the Space Shuttle STS-7 in June of 1983.

If conducted as planned, the upcoming March 29 spacewalk with Anne McClain and Christina Koch would be the first all-female spacewalk. Women have participated in science on the space station since 2001; here are the most recent and some highlights from their scientific work:

Christina Koch, Expedition 59


Christina Koch (pictured on the right) becomes the most recent woman in space, launching to the space station in mid-March to take part in some 250 research investigations and technology demonstrations. Koch served as station chief of the American Samoa Observatory and has contributed to the development of instruments used to study radiation particles for the Juno mission and the Van Allen Probe.

Anne McClain, Expedition 57/58, 59


Flight Engineer Anne McClain collects samples for Marrow, a long-term investigation into the negative effects of microgravity on the bone marrow and blood cells it produces. The investigation may lead to development of strategies to help prevent these effects in future space explorers, as well as people on Earth who experience prolonged bed rest. McClain holds the rank of Lieutenant Colonel as an Army Aviator, with more than 2,000 flight hours in 20 different aircraft.

Serena M. Auñón-Chancellor, Expedition 56/57


Serena Auñón-Chancellor conducts research operations for the AngieX Cancer Therapy inside the Microgravity Science Glovebox (MSG). This research may facilitate a cost-effective drug testing method and help develop safer and more effective vascular-targeted treatments. As a NASA Flight Surgeon, Auñón-Chancellor spent more than nine months in Russia supporting medical operations for International Space Station crew members. 

Peggy Whitson, Expeditions 5, 16, 50, 51/52


Astronaut Peggy Whitson holds numerous spaceflight records, including the U.S. record for cumulative time in space – 665 days – and the longest time for a woman in space during a single mission, 289 days. She has tied the record for the most spacewalks for any U.S. astronaut and holds the record for the most spacewalk time for female space travelers. She also served as the first science officer aboard the space station and the first woman to be station commander on two different missions. During her time on Earth, she also is the only woman to serve as chief of the astronaut office. Here she works on the Genes in Space-3 experiment, which completed the first-ever sample-to-sequence process entirely aboard the International Space Station. This innovation makes it possible to identify microbes in real time without having to send samples back to Earth, a revolutionary step for microbiology and space exploration.  

Kate Rubins, Expedition 48/49


The Heart Cells investigation studies the human heart, specifically how heart muscle tissue contracts, grows and changes its gene expression in microgravity and how those changes vary between subjects. In this image, NASA astronaut Kate Rubins conducts experiment operations in the U.S. National Laboratory. Rubins also successfully sequenced DNA in microgravity for the first time as part of the Biomolecule Sequencer experiment.

Samantha Cristoforetti, Expedition 42/43


The first Italian woman in space, European Space Agency (ESA) astronaut Samantha Cristoforetti conducts the SPHERES-Vertigo investigation in the Japanese Experiment Module (JEM). The investigation uses free-flying satellites to demonstrate and test technologies for visual inspection and navigation in a complex environment.

Elena Serova, Expedition 41/42


Cosmonaut Elena Serova, the first Russian woman to visit the space station, works with the bioscience experiment ASEPTIC in the Russian Glavboks (Glovebox). The investigation assessed the reliability and efficiency of methods and equipment for assuring aseptic or sterile conditions for biological investigations performed on the space station. 

Karen Nyberg, Expedition 36/37


NASA astronaut Karen Nyberg sets up the Multi-Purpose Small Payload Rack (MSPR) fluorescence microscope in the space station’s Kibo laboratory. The MSPR has two workspaces and a table used for a wide variety of microgravity science investigations and educational activities.

Sunita Williams, Expeditions 32/33, 14/15


This spacewalk by NASA astronaut Sunita Williams and Japan Aerospace Exploration Agency (JAXA) astronaut Aki Hoshide, reflected in Williams’ helmet visor, lasted six hours and 28 minutes. They completed installation of a main bus switching unit (MBSU) and installed a camera on the International Space Station’s robotic Canadarm2. Williams participated in seven spacewalks and was the second woman ever to be commander of the space station. She also is the only person ever to have run a marathon while in space. She flew in both the space shuttle and Soyuz, and her next assignment is to fly a new spacecraft: the Boeing CST-100 Starliner during its first operational mission for NASA’s Commercial Crew Program. 

Cady Coleman, Expeditions 26/27


Working on the Capillary Flow Experiment (CFE), NASA astronaut Catherine (Cady) Coleman performs a Corner Flow 2 (ICF-2) test. CFE observes the flow of fluid in microgravity, in particular capillary or wicking behavior. As a participant in physiological and equipment studies for the Armstrong Aeromedical Laboratory, she set several endurance and tolerance records. Coleman logged more than 4,330 total hours in space aboard the Space Shuttle Columbia and the space station.

Tracy Caldwell Dyson, Expedition 24


A system to purify water for use in intravenous administration of saline would make it possible to better treat ill or injured crew members on future long-duration space missions. The IVGEN investigation demonstrates hardware to provide that capability. Tracy Caldwell Dyson sets up the experiment hardware in the station’s Microgravity Science Glovebox (MSG). As noted above, she and Shannon Walker were part of the first space station crew with more than one woman. 

Shannon Walker, Expedition 24/25


Astronaut Shannon Walker flew on Expedition 24/25, a long-duration mission that lasted 163 days. Here she works at the Cell Biology Experiment Facility (CBEF), an incubator with an artificial gravity generator used in various life science experiments, such as cultivating cells and plants on the space station.  She began working in the space station program in the area of robotics integration, worked on avionics integration and on-orbit integrated problem-solving for the space station in Russia, and served as deputy and then acting manager of the On-Orbit Engineering Office at NASA prior to selection as an astronaut candidate.

Stephanie Wilson, STS-120, STS-121, STS-131


Astronaut Stephanie Wilson unpacks a Microgravity Experiment Research Locker Incubator II (MERLIN) in the Japanese Experiment Module (JEM). Part of the Cold Stowage Fleet of hardware, MERLIN provides a thermally controlled environment for scientific experiments and cold stowage for transporting samples to and from the space station. Currently serving as branch chief for crew mission support in the Astronaut Office, Wilson logged more than 42 days in space on three missions on the space shuttle, part of the Space Transportation System (STS). 

Other notable firsts:

Roscosmos cosmonaut Svetlana Savitskaya, the first woman to participate in an extra-vehicular activity (EVA), or spacewalk, on July 25, 1984

• NASA astronaut Susan Helms, the first female crew member aboard the space station, a member of Expedition 2 from March to August 2001

• NASA astronaut Peggy Whitson, the first female ISS Commander, April 2008, during a six-month tour of duty on Expedition 16

• The most women in space at one time (four) happened in 2010, when space shuttle Discovery visited the space station for the STS-131 mission. Discovery’s crew of seven included NASA astronauts Dorothy Metcalf-Lindenburger and Stephanie Wilson and Japan Aerospace Exploration Agency (JAXA) astronaut Naoko Yamazaki. The space station crew of six included NASA astronaut Tracy Caldwell Dyson.

• Susan Helms shares the record for longest single spacewalk, totaling 8 hours 56 minutes with fellow NASA astronaut Jim Voss. 

Expedition 24 marked the first with two women, NASA astronauts Shannon Walker and Tracy Caldwell Dyson, assigned to a space station mission from April to September, 2010

• The 2013 astronaut class is the first with equal numbers of women and men. 

• NASA astronaut Anne McClain became the first woman to live aboard the space station as part of two different crews with other women: Serena Auñón-Chancellor in December 2018 and currently in orbit with Christina Koch.

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Spacewalkers Complete Battery Swaps for Station Power Upgrades

ISS – Expedition 59 Mission patch / EVA – Extra Vehicular Activities patch.

March 22, 2019

Expedition 59 Flight Engineers Nick Hague and Anne McClain of NASA concluded their spacewalk at 2:40 p.m. EDT. During the six-hour, 39-minute spacewalk, the two NASA astronauts successfully replaced nickel-hydrogen batteries with newer, more powerful lithium-ion batteries for the power channel on one pair of the station’s solar arrays.

Astronauts were also able to accomplish several get-ahead tasks including removing debris from outside of the station, securing a tieback for restraints on the Solar Array Blanket Box, and photographing a bag of tools for contingency repairs and the airlock thermal cover that is opened and closed for spacewalks.

Image above: NASA astronauts Nick Hague (top) and Anne McClain work to swap batteries in the Port-4 truss structure during today’s spacewalk. Image Credit: NASA TV.

These new batteries provide an improved power capacity for operations with a lighter mass and a smaller volume than the nickel-hydrogen batteries. Next week, McClain and flight engineer Christina Koch are scheduled to venture outside on the March 29 spacewalk to work on a second set of battery replacements on a different power channel in the same area of the station. This would be the first-ever spacewalk with all-female spacewalkers.

Hague and David Saint-Jacques of the Canadian Space Agency are scheduled to conduct a third spacewalk April 8 to lay out jumper cables between the Unity module and the S0 truss, at the midpoint of the station’s backbone. This work will establish a redundant path of power to the Canadian-built robotic arm, known as Canadarm2. They also will install cables to provide for more expansive wireless communications coverage outside the orbital complex, as well as for enhanced hardwired computer network capability.

A Spacewalk Outside The International Space Station on This Week @NASA – March 22, 2019

Space station crew members have conducted 214 spacewalks in support of assembly and maintenance of the orbiting laboratory. This was the first spacewalk for both McClain and Hague. Spacewalkers have now spent a total of 55 days, 21 hours and 39 minutes working outside the station.

Related links:

Expedition 59: https://www.nasa.gov/mission_pages/station/expeditions/expedition59/index.html

Canadarm2: https://www.nasa.gov/mission_pages/station/structure/elements/mobile-servicing-system.html

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), Video (NASA), Text, Credits: NASA/Mark Garcia.

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Hubble Captures the Brilliant Heart of a Massive Galaxy

NASA – Hubble Space Telescope patch.

March 22, 2019

This fuzzy orb of light is a giant elliptical galaxy filled with an incredible 200 billion stars. Unlike spiral galaxies, which have a well-defined structure and boast picturesque spiral arms, elliptical galaxies appear fairly smooth and featureless. This is likely why this galaxy, named Messier 49 (M49), was discovered by French astronomer Charles Messier in 1771. At a distance of 56 million light-years and measuring 157,000 light-years across, M49 was the first member of the Virgo Cluster of galaxies to be discovered, and it is more luminous than any other galaxy at its distance or nearer.

Elliptical galaxies tend to contain a larger portion of older stars than spiral galaxies and also lack young, blue stars. Messier 49 itself is very yellow, which indicates that the stars within it are mostly older and redder than the Sun. In fact, the last major episode of star formation within the galaxy was about six billion years ago — before the Sun was even born!

Messier 49 is also rich in globular star clusters; it hosts about 6,000 — a number that dwarfs the 150 found in and around the Milky Way. On average, these clusters are 10 billion years old. Messier 49 is also known to host a supermassive black hole at its center with the mass of more than 500 million Suns, identifiable by the X-rays pouring out from the heart of the galaxy. (As this Hubble image comprises optical and infrared observations, these X-rays are not visible here.)

Messier 49 is featured in Hubble’s Messier catalog, which includes some of the most fascinating objects that can be observed from Earth’s Northern Hemisphere. See the NASA-processed image and other Messier objects at: https://www.nasa.gov/content/goddard/hubble-s-messier-catalog.

Hubble Space Telescope (HST)

For more information about Hubble, visit:




Image, Animation, Credit: ESA/Hubble & NASA, J. Blakenslee, P. Cote et al./Text Credit: European Space Agency (ESA)/NASA/Karl Hille.

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A “muoscope” with CMS technology

CERN – European Organization for Nuclear Research logo.

22 March, 2019

Particle physicists are experts at seeing invisible things and their detecting techniques have already found many applications in medical imaging or the analysis of art works. Researchers from the CMS experiment at the Large Hadron Collider are developing a new application based on one of the experiment’s particle detectors: a new, small-scale, portable muon telescope, which will allow imaging of visually inaccessible spaces.

Earth’s atmosphere is constantly bombarded by particles arriving from outer space. By interacting with atmospheric matter, they decay into a cascade of new particles, generating a flux of muons, heavier cousins of electrons. These cosmic-ray muons continue their journey towards the Earth’s surface, travelling through almost all material objects.

Image above: The resistive plate chambers (RPC) at CMS are fast gaseous detectors that provide a muon trigger system (Image: CERN).

This “superpower” of muons makes them the perfect partners for seeing through thick walls or other visually challenging subjects. Volcanic eruptions, enigmatic ancient pyramids, underground caves and tunnels: these can all be scanned and explored from the inside using muography, an imaging method using naturally occurring background radiation in the form of cosmic-ray muons. 

Large-area muon telescopes have been developed in recent years for many different applications, some of which use technology developed for the LHC detectors. The muon telescope conceived by CMS researchers from two Belgian universities, Ghent University and the Catholic University of Louvain, is compact and light and therefore easy to transport. It is nonetheless able to perform muography at high resolution. It will be the first spin-off for muography using the CMS Resistive Plate Chambers (RPC) technology. A first prototype of the telescope, also baptised a “muoscope”, has been built with four RPC planes with an active area of 16×16 cm. The same prototype was used in the “UCL to Mars” project; it was tested for its robustness in a simulation of Mars-like conditions in the Utah Desert, where it operated for one month and later came back fully functional.

Other CMS technologies have been used in muon tomography for security and environmental protection, as well as for homeland security.

Learn more about the muon telescope here: https://cms.cern/news/cms-technology-used-develop-new-portable-muon-telescope


CERN, the European Organization for Nuclear Research, is one of the world’s largest and most respected centres for scientific research. Its business is fundamental physics, finding out what the Universe is made of and how it works. At CERN, the world’s largest and most complex scientific instruments are used to study the basic constituents of matter — the fundamental particles. By studying what happens when these particles collide, physicists learn about the laws of Nature.

The instruments used at CERN are particle accelerators and detectors. Accelerators boost beams of particles to high energies before they are made to collide with each other or with stationary targets. Detectors observe and record the results of these collisions.

CERN, the European Organization for Nuclear Research, is one of the world’s leading laboratories for particle physics. The Organization is located on the French-Swiss border, with its headquarters in Geneva. Its Member States are: Austria, Belgium, Bulgaria, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Israel, Italy, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Spain, Sweden, Switzerland and United Kingdom. Cyprus, Serbia and Slovenia are Associate Member States in the pre-stage to Membership. India, Lithuania, Pakistan, Turkey and Ukraine are Associate Member States. The European Union, Japan, JINR, the Russian Federation, UNESCO and the United States of America currently have Observer status.

Related links:

UCL to Mars: http://www.ucltomars.org/

Security and environmental protection: http://cms.cern/content/security-and-environmental-protection

Homeland security: http://cms.cern/content/homeland-security

For more information about European Organization for Nuclear Research (CERN), Visit: https://home.cern/

Image (mentioned), Text, Credits: CERN/Cristina Agrigoroae.

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Galactic Center Visualization Delivers Star Power

Want to take a trip to the center of the Milky Way? Check out a new immersive, ultra-high-definition visualization. This 360-movie offers an unparalleled opportunity to look around the center of the galaxy, from the vantage point of the central supermassive black hole, in any direction the user chooses.

By combining NASA Ames supercomputer simulations with data from NASA’s Chandra X-ray Observatory, this visualization provides a new perspective of what is happening in and around the center of the Milky Way. It shows the effects of dozens of massive stellar giants with fierce winds blowing off their surfaces in the region a few light years away from the supermassive black hole known as Sagittarius A* (Sgr A* for short).

These winds provide a buffet of material for the supermassive black hole to potentially feed upon. As in a previous visualization, the viewer can observe dense clumps of material streaming toward Sgr A*. These clumps formed when winds from the massive stars near Sgr A* collide. Along with watching the motion of these clumps, viewers can watch as relatively low-density gas falls toward Sgr A*. In this new visualization, the blue and cyan colors represent X-ray emission from hot gas, with temperatures of tens of millions of degrees; red shows moderately dense regions of cooler gas, with temperatures of tens of thousands of degrees; and yellow shows of the cooler gas with the highest densities.

A collection of X-ray-emitting gas is seen to move slowly when it is far away from Sgr A*, and then pick up speed and whip around the viewer as it comes inwards. Sometimes clumps of gas will collide with gas ejected by other stars, resulting in a flash of X-rays when the gas is heated up, and then it quickly cools down. Farther away from the viewer, the movie also shows collisions of fast stellar winds producing X-rays. These collisions are thought to provide the dominant source of hot gas that is seen by Chandra.

When an outburst occurs from gas very near the black hole, the ejected gas collides with material flowing away from the massive stars in winds, pushing this material backwards and causing it to glow in X-rays. When the outburst dies down the winds return to normal and the X-rays fade.

The 360-degree video of the Galactic Center is ideally viewed through virtual reality (VR) goggles, such as Samsung Gear VR or Google Cardboard. The video can also be viewed on smartphones using the YouTube app. Moving the phone around reveals a different portion of the movie, mimicking the effect in the VR goggles. Finally, most browsers on a computer also allow 360-degree videos to be shown on YouTube. To look around, either click and drag the video, or click the direction pad in the corner.

Dr. Christopher Russell of the Pontificia Universidad Católica de Chile (Pontifical Catholic University) presented the new visualization at the 17th meeting of the High-Energy Astrophysics (HEAD) of the American Astronomical Society held in Monterey, Calif. NASA’s Marshall Space Flight Center in Huntsville, Alabama, manages the Chandra program for NASA’s Science Mission Directorate in Washington. The Smithsonian Astrophysical Observatory in Cambridge, Massachusetts, controls Chandra’s science and flight operations.

Fast Facts for PSS 0133+0400:

Credit: NASA/CXC/Pontifical Catholic Univ. of Chile /C.Russell et al.

Category: Normal Galaxies & Starburst Galaxies, Milky Way Galaxy & Black Holes
Coordinates (J2000): RA 17h 45m 40s | Dec -29° 00´ 28.00″
Constellation: Sagittarius
Instrument: ACIS
References: Russell, C. et al. 2017, MNRAS, 464, 4958, arXiv:1607.01562
Distance Estimate: About 26,000 light years

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New light into the recent evolution of the African rift valley…

New light into the recent evolution of the African rift valley http://www.geologypage.com/2019/03/new-light-into-the-recent-evolution-of-the-african-rift-valley.html

Hundreds of bubble streams link biology, seismology off…

Hundreds of bubble streams link biology, seismology off Washington’s coast http://www.geologypage.com/2019/03/hundreds-of-bubble-streams-link-biology-seismology-off-washingtons-coast.html

Volcano cliffs can affect monitoring data…

Volcano cliffs can affect monitoring data http://www.geologypage.com/2019/03/volcano-cliffs-can-affect-monitoring-data.html

Ancient birds out of the egg running…

Ancient birds out of the egg running http://www.geologypage.com/2019/03/ancient-birds-out-of-the-egg-running.html

Scientists argue for more comprehensive studies of Cascade…

Scientists argue for more comprehensive studies of Cascade volcanoes http://www.geologypage.com/2019/03/scientists-argue-for-more-comprehensive-studies-of-cascade-volcanoes.html

World’s Biggest Tyrannosaurus rex…

World’s Biggest Tyrannosaurus rex http://www.geologypage.com/2019/03/worlds-biggest-tyrannosaurus-rex.html

‘The Andle Stone’ Prehistoric Feature, Stanton Moor, Derbyshire, 17.3.19.

‘The Andle Stone’ Prehistoric Feature, Stanton Moor, Derbyshire, 17.3.19.

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