A distant tailless comet hails from inner solar system, but as its lack of ice shows, it's likely an ancient body, hailing from when the planets were being born.
The film, which offers an astronaut's view of the world from the ISS, opens Friday.
How did these odd scars form on the icy world?
Astronomers using the Hubble Space Telescope have found a tiny, dark moon circling the dwarf planet Makemake, a Pluto sibling in the solar system’s distant Kuiper Belt.
Was there a so-called 'super-Earth' planet that formed inside the orbit of Mercury? If so, it might have been eaten by our sun.
For a long time, scientists have operated on the idea that new planets form around young stars. But it turns out that dying stars may also be able to make baby planets.
Although we haven't yet pinpointed the location of a possibly large planet in the outer solar system, we are beginning to paint a picture as to what the mysterious world might look like and what it's made of.
A Japanese spacecraft's long-awaited Venus campaign is finally about to begin.
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