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Topic: W.M. Keck Observatory
What makes this moon so alluring is the possibility that it may possess all of the ingredients necessary for life. Scientists have evidence that one of these ingredients, liquid water, is present under the icy surface and may sometimes erupt into space in huge geysers. ![]() On the left is a view of Europa taken from 2.9 million kilometers (1.8 million miles) away on March 2, 1979 by the Voyager 1 spacecraft. Next is a color image of Europa taken by the Voyager 2 spacecraft during its close encounter on July 9, 1979. On the right is a view of Europa made from images taken by the Galileo spacecraft in the late 1990s. (NASA/JPL) «Read the rest of this article» Sections: Technology | No Comments
NASA’s TESS Satellite discovers Hot Planet, Leads to finding more Worlds
The new worlds orbit a star named GJ 357, an M-type dwarf about one-third the Sun’s mass and size and about 40% cooler that our star. The system is located 31 light-years away in the constellation Hydra. In February, TESS cameras caught the star dimming slightly every 3.9 days, revealing the presence of a transiting exoplanet — a world beyond our solar system — that passes across the face of its star during every orbit and briefly dims the star’s light. ![]() This diagram shows the layout of the GJ 357 system. Planet d orbits within the star’s so-called habitable zone, the orbital region where liquid water can exist on a rocky planet’s surface. If it has a dense atmosphere, which will take future studies to determine, GJ 357 d could be warm enough to permit the presence of liquid water. (NASA’s Goddard Space Flight Center/Chris Smith) «Read the rest of this article» Sections: Technology | No Comments
NASA discovers portions of Jupiter’s Moon Europa’s surface is Table Salt
The discovery suggests that the salty subsurface ocean of Europa may chemically resemble Earth’s oceans more than previously thought, challenging decades of supposition about the composition of those waters. The finding was published by Science Advances on June 12th. ![]() Tara Regio is the yellowish area to left of center, in this NASA Galileo image of Europa’s surface. This region of geologic chaos is the area researchers identified an abundance of sodium chloride. (NASA/JPL/University of Arizona) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Spitzer Space Telescope sees galaxies merging into oneNASA Jet Propulsion Laboratory
Some merged galaxies will experience billions of years of growth. For others, however, the merger will kick off processes that eventually halt star formation, dooming the galaxies to wither prematurely. ![]() This image shows the merger of two galaxies, known as NGC 7752 (larger) and NGC 7753 (smaller), also collectively called Arp86. In these images, different colors correspond to different wavelengths of infrared light. Blue and green are wavelengths both strongly emitted by stars. Red is a wavelength mostly emitted by dust. (NASA/JPL-Caltech) «Read the rest of this article» Sections: Sports | No Comments
Citizen Scientists use NASA’s Kepler Space Telescope data to discover New WorldWritten by Francis Reddy
“It’s a very exciting discovery due to how it was found, its temperate orbit and because planets of this size seem to be relatively uncommon,” said Adina Feinstein, a University of Chicago graduate student who discussed the discovery on Monday, January 7th, at the 233rd meeting of the American Astronomical Society in Seattle. ![]() The newfound planet K2-288Bb, illustrated here, is slightly smaller than Neptune. Located about 226 light-years away, it orbits the fainter member of a pair of cool M-type stars every 31.3 days. (NASA’s Goddard Space Flight Center/Francis Reddy) «Read the rest of this article» Sections: Sports | No Comments
NASA looks for Water deep in Jupiter’s AtmosphereWritten by Lonnie Shekhtman
But one critical question has bedeviled astronomers for generations: Is there water deep in Jupiter’s atmosphere, and if so, how much? ![]() This visualization was created from images captured by NASA’s Juno spacecraft, which has been studying Jupiter since it arrived there July 4th, 2016. (NASA/JPL/SwRI) «Read the rest of this article» Sections: Technology | No Comments
NASA reports new study shows Star’s dimming episodes due to Clouds of Gas and DustWritten by Francis Reddy
“Our observations show there are massive blobs of dust and gas that occasionally block the star’s light and are probably spiraling into it,” said Kristina Punzi, a doctoral student at the Rochester Institute of Technology (RIT) in New York and lead author of a paper describing the findings. “Although there could be other explanations, we suggest this material may have been produced by the break-up of massive orbiting bodies near the star.” «Read the rest of this article» Sections: Technology | No Comments
NASA reports Stars with Disk of Debris are more likely to have Giant ExoplanetsWritten by Elizabeth Landau
A new study finds that giant exoplanets that orbit far from their stars are more likely to be found around young stars that have a disk of dust and debris than those without disks. The study, published in The Astronomical Journal, focused on planets more than five times the mass of Jupiter. This study is the largest to date of stars with dusty debris disks, and has found the best evidence yet that giant planets are responsible for keeping that material in check. ![]() This artist’s rendering shows a large exoplanet causing small bodies to collide in a disk of dust. (NASA/JPL-Caltech) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Kepler Space Telescope finds 219 new Planet CandidatesWritten by Michele Johnson
This is the most comprehensive and detailed catalog release of candidate exoplanets, which are planets outside our solar system, from Kepler’s first four years of data. It’s also the final catalog from the spacecraft’s view of the patch of sky in the Cygnus constellation. ![]() NASA’s Kepler space telescope team has identified 219 new planet candidates, 10 of which are near-Earth size and in the habitable zone of their star. (NASA/JPL-Caltech) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Hubble Space Telescope sees Comet-Like Object ripped apart in Atmosphere of White DwarfWritten by Ann Jenkins / Ray Villard
The object has a chemical composition similar to Halley’s Comet, but it is 100,000 times more massive and has a much higher amount of water. It is also rich in the elements essential for life, including nitrogen, carbon, oxygen, and sulfur. ![]() This artist’s concept shows a massive, comet-like object falling toward a white dwarf. New Hubble Space Telescope findings are evidence for a belt of comet-like bodies orbiting the white dwarf, similar to our solar system’s Kuiper Belt. The findings also suggest the presence of one or more unseen surviving planets around the white dwarf, which may have perturbed the belt to hurl icy objects into the burned-out star. (NASA, ESA, and Z. Levy (STScI)) «Read the rest of this article» Sections: Technology | No Comments
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