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Recent Articles
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Topic: Red Dwarf
Scientists tapped into the worldwide network of 150,000 volunteers using Backyard Worlds: Planet 9 to find new examples of brown dwarfs. These objects are balls of gas that are not heavy enough to be stars since they can’t power themselves through nuclear fusion the way stars do. ![]() Artist’s conception of a brown dwarf, featuring the cloudy atmosphere of a planet and the residual light of an almost-star. (NASA/ESA/JPL) «Read the rest of this article» Sections: Technology | No Comments
NASA uses Earth Climate Models to Picture Life on Unimaginable Worlds
These machines collectively are known as NASA’s Discover supercomputer and they are tasked with running sophisticated climate models to predict Earth’s future climate. «Read the rest of this article» Sections: Technology | No Comments
NASA’s Hubble Space Telescope discovers hot Neptune losing its AtmosphereNASA Headquarters
These planets are scorching hot because they orbit very close to their star. But so-called “hot Neptunes,” whose atmospheres are heated to more than 1,700 degrees Fahrenheit, have been much harder to find. In fact, only about a handful of hot Neptunes have been found so far. ![]() This artist’s illustration shows a giant cloud of hydrogen streaming off a warm, Neptune-sized planet just 97 light-years from Earth. The exoplanet is tiny compared to its star, a red dwarf named GJ 3470. The star’s intense radiation is heating the hydrogen in the planet’s upper atmosphere to a point where it escapes into space. (NASA, ESA and D. Player (STScI)) «Read the rest of this article» Sections: Technology | No Comments
NASA’s MAVEN mission insights about Mars helps with understanding Distant Planets HabitabilityWritten by Elizabeth Zubritsky
“The MAVEN mission tells us that Mars lost substantial amounts of its atmosphere over time, changing the planet’s habitability,” said David Brain, a MAVEN co-investigator and a professor at the Laboratory for Atmospheric and Space Physics at the University of Colorado Boulder. “We can use Mars, a planet that we know a lot about, as a laboratory for studying rocky planets outside our solar system, which we don’t know much about yet.” ![]() This illustration depicts charged particles from a solar storm stripping away charged particles of Mars’ atmosphere, one of the processes of Martian atmosphere loss studied by NASA’s MAVEN mission, beginning in 2014. Unlike Earth, Mars lacks a global magnetic field that could deflect charged particles emanating from the Sun. (NASA/GSFC) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Galaxy Evolution Explorer examines how Red Dwarf Flares effect Orbiting PlanetsWritten by Christine Pulliam
But, like our own sun, many of these stars erupt with intense flares. Are red dwarfs really as friendly to life as they appear, or do these flares make the surfaces of any orbiting planets inhospitable? To address this question, a team of scientists has combed 10 years of ultraviolet observations by NASA’s Galaxy Evolution Explorer (GALEX) spacecraft looking for rapid increases in the brightness of stars due to flares. ![]() This illustration shows a red dwarf star orbited by a hypothetical exoplanet. (NASA/ESA/G. Bacon (STScI)) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Kepler Space Telescope searches for another EarthWritten by Whitney Clavin
To take a brief tour of the more prominent contenders, it helps to zero in on the “habitable zone” around their stars. This is the band of congenial temperatures for planetary orbits — not too close and not too far. ![]() A newly discovered exoplanet, Kepler-452b, comes the closest of any found so far to matching our Earth-sun system. A newly discovered exoplanet, Kepler-452b: from left, Kepler-22b, Kepler-69c, the just announced Kepler-452b, Kepler-62f and Kepler-186f. Last in line is Earth itself. (NASA/Ames/JPL-Caltech) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Hubble Space Telescope gets unique chance to hunt Earth-sized planets during Rare Alignment with Proxima Centauri
The opportunities will occur in October 2014 and February 2016 when Proxima Centauri, the star nearest to our sun, passes in front of two other stars. Astronomers plotted Proxima Centauri’s precise path in the heavens and predicted the two close encounters using data from Hubble. ![]() This plot shows the projected motion of the red dwarf star Proxima Centauri (green line) over the next decade, as plotted from Hubble Space Telescope observations. Because of parallax due to Earth’s motion around the sun, the path appears scalloped. (Credit:NASA, ESA, K. Sahu and J. Anderson (STScI), H. Bond (STScI and Pennsylvania State University), M. Dominik (University of St. Andrews), and Digitized Sky Survey (STScI/AURA/UKSTU/AAO)) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Kepler space telescope discovers White Dwarf bending light of nearby StarWritten by Whitney Clavin
The dead star, called a white dwarf, is the burnt-out core of what used to be a star like our sun. It is locked in an orbiting dance with its partner, a small “red dwarf” star. While the tiny white dwarf is physically smaller than the red dwarf, it is more massive. ![]() This artist’s concept depicts a dense, dead star called a white dwarf crossing in front of a small, red star. The white dwarf’s gravity is so great it bends and magnifies light from the red star. (Image credit: NASA/JPL-Caltech) «Read the rest of this article» Sections: Technology | No Comments
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