HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

When NASA launched a spacecraft to an asteroid, scientists patiently waited for their chance to look at bits of the space ...

The Gaia mission, launched by the European Space Agency, has completed a decade of groundbreaking astronomical observations, collecting over three trillion data points on two billion stars and ...

"We are literally mapping the entire celestial sky in 102 infrared colors for the first time in humanity's history." ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...