A newly discovered object is the most-distant body ever observed in the solar system — and the first object ever found circling at more than 100 times the distance from Earth to the sun.
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As a Jupiter-size world swings around its small but active star, bombarded by radiation, the planet leaves behind a tail of escaping helium as wide as itself — and researchers have spotted this tail from the ground.
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SpaceX's Dragon spacecraft lifted off into clear blue skies today (Dec. 5), but its first stage spiraled down in a failed landing.
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In his final book, released Oct. 16, Stephen Hawking tackles big questions about the universe, delving into physics, cosmology, the existence of God and the future direction of humanity.
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The clouds' rippling and flow reflect the movement of air in the upper atmosphere resulting from a phenomenon called atmospheric gravity waves.
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The European Southern Observatory's Very Large Telescope in Chile has a busy observation schedule, but sometimes cloudy or moonlit skies mean a temporary halt to scientific measurements. Then, it grabs images like this.
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