Solar System

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    By combining observations and existing data, astronomers have discovered that the star Gliese 667C is orbited by between five and seven planets. Three of the planets are super-Earths that rest in the star's habitable zone.
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    In this interview, Dr. David Grinspoon discusses the implications of the Anthropocene -- a timescale defined by humanity as a geological force shaping the global landscape and evolution of our planet.
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    Nesta entrevista o Dr. David Grinspoon discute as implicações do Antropoceno – uma escala de tempo definida como a humanidade sendo uma força geológica a modificar a paisagem global e a evolução do nosso planeta.
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    NASA has announced a Grand Challenge focused on finding all the asteroids that could threaten the life's future on Earth - and determining what to do about them.
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    Scientists have found that a common antifreeze compound that might exist on Saturn's moon Titan can get trapped within ice-like cages. This discovery could influence our ideas about the evolution and development of life on Titan and other icy celestial bodies.
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    The Earth system includes intricate interactions between everything from our planet's dynamic climate to geological and biological processes. A new study is helping astrobiolgists understand just how stable the Earth system is.
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    A new study shows that hunks of frozen carbon dioxide (or dry ice) could create marks on martian sand dunes by gliding down the slope on cushions of gas. The study could help interpret whether or not certain structures on Mars are formed by flowing
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    Scientists have discovered tiny bubbles of water found in quartz grains in Australia. The bubbles may hold the key to understanding what caused the Earth’s first ice age.
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    New research shows that a key element for life on Earth was delivered to our planet on meteorites. The heavy bombardment of meteorites during the Hadean and Archean eons provided reactive phosphorus that could have been incorporated into prebiotic molecules.
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    Research that sheds light on how Australian opals formed indicates the red dirt in the land Down Under might be similar to the red surface of Mars.
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    Astrobiologists have discovered high concentrations of boron in a martian meteorite. Boron may have played a key role in the formation of RNA, a molecule that could have played an important role in the origin of life.
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    The red dwarf Proxima Centauri is about to make a rare conjunction with two background stars. Observations of the event could determine if Earth-sized worlds orbit our nearest stellar neighbor.
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    Astronomers have imaged a faint object moving near a bright star. The object has an estimated mass of four to five times that of Jupiter, making it the least massive planet directly observed thus far.
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    A sequence of radar images of asteroid 1998 QE2 show that it is a binary asteroid. The images suggest that the primary body is approximately 2.7 kilometers in diameter, and the satellite, or moon, is The preliminary estimate for the size of the satellite, or
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    NASA's Curiosity rover has returned images of what may have been a riverbed on Mars. The observations reveal areas with gravel and pebbles. After studying the size and shape of the pebbles, a team of scientists has reported that the features are clear evidence of
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