... Views of Martian Clouds . ... Although not as pronounced as on Earth , clouds are common features on Mars. The Martian atmosphere has only a trace of water vapor; however, the temperature and pressure is such that the atmosphere is usually close to saturation and produces clouds. Even from Earth based telescopes, clouds have been observed by transient brightening on the surface of Mars. ... Lee waves . ... Wave clouds . ... Image Credit: Calvin J. Hamilton) . Lee Wave . ... Wave Clouds . ...

... 2016 March 17 . Close Comet and Large Magellanic Cloud . ... Explanation: Sporting a surprisingly bright , lovely green coma Comet 252P/Linear poses next to the Large Magellanic Cloud in this southern skyscape. ... In fact, it is one of two comets that will make remarkably close approaches in the next few days as a much fainter Comet Pan-STARRS (P/2016 BA14) comes within 3.5 million kilometers (9 times the Earth-Moon distance) on March 22. ... About APOD | ... A service of: ASD at NASA / GSFC . ...

... Highest, Tallest, and Closest to the Stars . ... Shrouded in cloud Everest's peak is at 8,848 meters (29,029 feet) elevation above sea level. ... Still, measured from its base starting below the ocean's surface, Mauna Kea is over 10,000 meters tall, making it Earth's tallest mountain from base to summit. ... The highest equatorial mountain, the Chimborazo volcano's peak elevation is 6,268 meters above sea level. ... That makes Chimborazo's summit the place on Earth's surface closest to the stars . ...

The Sun is our nearest star and the source of energy for life on Earth. ... For centuries astronomers wondered whether they were clouds floating in the Sun's atmosphere, but we now know that they really are huge regions of magnetic field, about as intense as the field at the poles of an iron magnet. ... Such abrupt events were named solar flares , and what made them especially interesting was that occasionally, after a prominent flare, a magnetic storm would erupt on Earth. ...

... Sun . ... ESA?s Venus Express mission returned this image of sulphuric acid clouds over the southern hemisphere of Venus (Image credit: ESA) . ... Venus was long thought of as Earthт??s т??sister planetт?? ... Galileo was first to see that Venus shows phases just as our Moon does and he cleverly used this fact (along with the planetт??s proximity to the Sun) to demonstrate that Venus orbited the Sun and not the Earth. ... As its surface is hidden by clouds, Venus was regarded as a mysterious planet....

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... the star might be able to see the lead- and zirconium-rich . ... Naslim Neelamkodan, Simon Jeffery, Natalie Behara and Alan Hibbert are studying the surfaces of small hot stars, known as helium-rich subdwarfs. ... Now studying a group of similar stars, they have discovered two which have surfaces containing ten thousand (10,000) times more lead than is present on the surface of the Sun. ... Prof Simon Jeffery . ...

... An artificial comet holds secrets to Earths life . ... Astronomers recently discovered that Scholz's star passed close to the Sun 70,000 years ago. Wouldn't its gravity have sent Oort Cloud comets raining into the inner planets? ... COMETS | OORT CLOUD . Based on the number of long-period comets that enter the inner solar system, astronomers estimate there are probably trillions of them in the Oort Cloud. Get instant access to subscriber content on Astronomy.com! ... Discover | ...

... Advantages of a Larger Aperture for TPF-C Can Search More Stars to Greater Distances (~D3 ) Faster Survey, More Time for Follow-Up Sensitive to Planets in Habitable Zone of More/Fainter Stars Smaller Inner Working Angle (at Fixed Wavelength) Lower Mass Stars , Fewer Visits /Star for Significant Null Result, Improved Orbits, Efficient Recovery on Future Visits TPF-C Observability of ...

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