Three planets, two stars and one moon create a spectacular June sky show.

Venus is often referred to as Earth’s “sister planet” due to its comparable size ...

A team of astronomers has found the strongest evidence yet that some planets outside our solar system may be magnetic. Using ...

A close conjunction of the two brightest planets in the night sky will take place over several evenings, with the best time ...

Astronomers have found the strongest evidence yet that some planets outside our Solar System may have magnetic fields.

The manifesto leaned heavily on Isaac Newton’s theories in making a case for independence, and fellow founders drew on the ...

The bright planets will appear within a pinkie width of each other this June—their closest alignment until 2028.

According to researchers, some of these black holes may have formed without first going through a stellar collapse phase.

Ancient Greek astronomers likely observed Uranus as a star, but limited tools and geocentric views kept them from recognizing ...

Venus, Jupiter and Mercury headline a spectacular month of planetary viewing.

June opens with a striking lineup of celestial events that draw attention to the evening and nighttime sky. The full ...

The transits of Venus in 1761 and 1769 offered a way to calculate the true size of the Solar System. Getting to the right ...