Earth's orbit is an ellipse, not a perfect circle. Earth's distance from the Sun varies by about 3 million miles throughout the year. Earth's orbit's semimajor axis is approximately 93 million miles.

NASA has released a 3D animation depicting the exterior of the upcoming Gateway space station, a lunar orbiting outpost designed to facilitate extended space missions. Scheduled for launch in 2025, ...

Bennu is a roughly 0.3-mile-wide (500 meters) asteroid that orbits in near-Earth space. Scientists suspect it’s a chunk of a larger asteroid that broke off due to a collision farther out. Telescope ...

During its initial molten phase, the Moon experienced tidal bulges on its near and far sides due to Earth's immense gravitational pull. The Moon's rotation initially carried these gravitationally ...

Astronomy leads the astronomy hobby as the most popular magazine of its kind in the world. Get information about subscriptions, digital editions, renewals, advertising and much, much more.

Asteroid 2019 LF6, a newly discovered Atira asteroid, has an orbit entirely contained within Earth's orbit, a characteristic of this rare class of near-Earth objects. The discovery of 2019 LF6 is ...

Comet 24P/Schaumasse is presented as an observable target, estimated at 12th magnitude, situated in the vicinity of Leo the Lion. Optimal viewing for Comet 24P/Schaumasse is specified for ...

On November 17, the Leonid meteor shower is forecast for the early morning, with its radiant in Leo rising to over 50° by 4 A.M. local time, offering observations of fast-moving, bright meteors with ...

Following its lunar mission, China's Chang'e 2 probe performed a flyby of asteroid 4179 Toutatis on December 13, 2012, after departing lunar orbit on June 9, 2011. During the 25-minute flyby, ...

When it comes to appearances, the universe is a tricky place. Visible light occupies merely a sliver of the electromagnetic (EM) spectrum. To study the cosmos in its entirety, scientists must peer ...

Black holes are regions of spacetime with gravity so strong that nothing escapes. Black holes grow by consuming nearby matter, slowing their eventual evaporation. Hawking radiation causes black holes ...

AI improves the precision of cosmological parameter measurements. This AI method is significantly more cost-effective than traditional approaches. The AI analyzes both large and small-scale galaxy ...