That's encouraging, but as for its newly confirmed planet, a few details remain a bit dicey. HD 20794 d's orbit is elliptical, not circular like Earth's, so the distance it keeps from its star changes ...

Trans-Neptunian objects (TNOs) are icy bodies that vary widely in size, from large dwarf planets like Pluto and Eris—each ...

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

REx mission has an historic opportunity to closely observe the asteroid Apophis and improve our ability to defend against ...

An incredible simulation has shown exactly what would happen if a 'city killer' asteroid was to hit Earth. That's right, a ...

The four planet-strong "planet parade" currently visible to the naked eye in the night sky for a short time after sunset will ...

Jupiter has been high in the sky in the evening lately, and that stirred a memory of the first time I ever saw Jupiter ...

The zodiacal light shines in the evening as the Moon reaches Last Quarter and skims past Spica and Antares in the sky this ...

Although the occurrence climaxed on Jan. 21 with a conjunction—close alignment—of Saturn and Mercury, the planetary parade ...

These popular astronomy questions, answered by Astronomy magazine, will help you better understand our universe - and share ...

"An asteroid this size impacts Earth on average every few thousand years and could cause severe damage to a local region," ...

Is Earth really exceptional?  A new book seems to reaffirm that notion.  But given the right conditions, primitive life may be a mere byproduct of biophysics.