NASA’s MESSENGER spacecraft is in the final days of an unprecedented and unexpectedly long-lived, close-up study of the innermost planet of the solar system, with a crashing finale expected in two weeks.
This is the first color photo of Pluto and moon Charon captured by NASA's New Horizons mission, providing an exciting clue as to what lies in store during the spacecraft's flyby on July 14.
The primordial planet believed to have smashed into baby Earth, creating a cloud of debris that eventually formed into the moon, was chemically a near-match to Earth.
When it comes to making planets as big as Jupiter, Mother Nature has kept her recipe secret. But scientists believe they have finally cracked the mystery.
There are many things in life whose constancy we can rely on -- friends, family, death, taxes -- but our home planet isn't one of them. Things are 'a' changin'. Slooowly. How would you feel about longer days, shorter springs, and a new north star?
The ringed planet might have a longer day than originally calculated.
Jupiter's early migration through the inner solar system caused gravitational mayhem, but it ultimately settled to allow Earth to form in a relatively quiet neighborhood.
A study based on 151 multi-planetary systems found by NASA's Kepler space telescope shows that most have a planet -- or two or three.
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