This article advocates the addition of a third category: that of satellites in highly elliptical orbits (HEO ... that would revolve around the planet once in 24 hours — a period of time that ...

Two bands of radiation called the Van Allen belts encircle Earth. After a May 2024 solar superstorm, two more showed up between those belts.

China has managed to deliver a pair of satellites into lunar orbit despite the spacecraft initially being stranded in low ...

Before arriving at the moon, the small satellite mission will use the gravity of the sun, Earth, and moon over several months ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...

Lunar Trailblazer's voyage to the Moon will take between four and seven months, de-pending on the day it launches. This ...

There are thousands upon thousands of questions related to the topic of astronomy, from the basics of the science to the ...

Around a star just 20 light ... but based on life on Earth, the one thing all life requires is liquid water. So, step one for finding a habitable exoplanet is figuring out where it orbits its star. If ...

From space, scientists can track everything from sea levels or greenhouse gases to infectious bacteria or water stored ...

"Fasten Your Space Belts" could be part of a spaceflight one-two punch today. SpaceX plans to launch yet another batch of its Starlink internet satellites today, during a nearly 3.5-hour window that ...

New research suggests that dark energy isn't needed to explain the acceleration in the expansion of the universe — instead ...