The sun's distance ... discovery has more to do with the observation of orbits of other planets. "In about 1604, Johannes Kepler fitted an ellipse model of Mars' orbit to observations of Mars ...

Named HD 20794 D, the newly discovered exoplanet orbits a star similar to the Sun, and researchers believe it may be able to ...

Mars, Venus, Jupiter, Saturn, Uranus and Neptune will appear together in a row throughout the start of February – although Neptune and Uranus will only be visible with binoculars or a telescope.

A suspected planet that appears well-suited to life has had its existence confirmed – and it’s very much in our neighborhood, ...

The world's space agencies are keeping close watch on an asteroid heading our way, because there's currently a 1 in 83 chance ...

Scientists now think that a mysterious object massive enough to have gravitational interactions with the Solar System’s disk ...

A chunk of space rock that visited near Earth's orbit last year was widely called a "mini-moon," a nickname that was more ...

The planets Mercury, Venus, Earth, and Mars, are called terrestrial because they have a compact, rocky surface like Earth’s terra firma. The terrestrial planets are the four innermost planets in the ...

This is a manifesto disguised as a novel and makes no secret of its intent. The characters feel undifferentiated like ...

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

Astronomers refer to this type of event as a 'planetary alignment,' which occurs because the planets orbit the sun in a plane called ... four or more planets, do not happen annually.

You won't have to wait long for all six planets to be in the sky. They'll be there as soon as the sun sets. Once it's dark, you'll only have a couple of hours to view them before Venus ...