Monday 20 November 2017

Astronomers reveal nearby stars that are among the oldest in our galaxy

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Astronomers have discovered some of the oldest stars in our Milky Way galaxy by determining their locations and velocities.
via Science Daily
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Previous evidence of water on Mars now identified as grainflows

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Dark features previously proposed as evidence for significant liquid water flowing on Mars have now been identified as granular flows, where sand and dust move rather than liquid water, according to a new article. These findings indicate that present-day Mars may not have a significant volume of liquid water. The water-restricted conditions that exist on Mars would make it difficult for Earth-like life to exist near the surface.
via Science Daily
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First interstellar asteroid is like nothing seen before

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For the first time ever astronomers have studied an asteroid that has entered the Solar System from interstellar space. Observations from ESO's Very Large Telescope in Chile and other observatories around the world show that this unique object was traveling through space for millions of years before its chance encounter with our star system. It appears to be a dark, reddish, highly-elongated rocky or high-metal-content object.
via Science Daily
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Space dust may transport life between worlds, research suggests

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Life on Earth might have originated from tiny organisms brought to our planet in streams of fast-moving space dust, according to a new study.
via Science Daily
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50 years since iconic 'A Model of Leptons' published

Integral orbits

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Visualising 15 years in space for ESA’s Integral satellite
via ESA Space Science
http://www.esa.int/ESA_Multimedia/Images/2017/11/Integral_s_orbits_2002_17