ESA's Solar Orbiter captured views of the planet Mercury passing in front of the Sun. Multiple instruments aboard the spacecraft captured the imagery. Credit: Space.com | footage & orbit animation cou ...

Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.

The moon's orbit is elliptical, or oval-shaped, meaning as its distance from our planet changes, its apparent size changes, ...

Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

The four-planet lineup that began in January concludes by mid- to late February, as Saturn sinks increasingly lower in the ...

The period of the Mercury retrograde causes communication mix-ups and mishaps for Leo, and this could interfere with Leo’s ...

NASA is a methodical institution that plans its missions years or even decades in advance, enjoys a famously loyal workforce ...

Clyde Tombaugh didn't set out to discover Pluto when he sent his sketches of the night sky to Lowell Observatory in Flagstaff ...

Mars, Jupiter and Saturn are frequently seen in the night sky; but because Venus and Mercury orbit closer to the sun than Earth, with smaller, faster orbits, it's rare for them to make an ...

An asteroid that could level a city now has a 3.1 percent chance of striking Earth in 2032, according to NASA data released ...

A space-based telescope has captured new images of the sun that showcase one of our star's fiery outbursts — and Mercury is ...