Solar system

The successful unfurling of the five-layered, tennis court-sized assemblage is a major milestone for the new observatory

This new release uses a comet hurtling toward Earth to satirize the way we dismiss scientific facts and the scientists who discover them

The Parker Solar Probe has passed through a boundary and into the Sun’s atmosphere, gathering data that will help scientists better understand stars

A communications glitch between the observatory and its launch vehicle forced the delay, NASA officials say

After some two decades of development, the orbital observatory is set to at last reach space on December 22

With a density close to that of pure iron, GJ 367b may be the remnant metal-rich core of an evaporated giant world

A new theory suggests that searches for molecular complexity could uncover convincing evidence of extraterrestrial life—and do so soon

Our planet is vulnerable to thousands of “city-killer” space rocks. If—when—one is found on a collision course with Earth, will we be ready to deflect it?

“The test has so far generated over 1,500 pieces of trackable orbital debris,” a State Department spokesperson said

The giant planet’s hefty gravitational tug helps explain a spate of recent asteroid strikes

Sparked by major advances in their field, astrobiologists are grappling with how best to discuss possible breakthrough discoveries with the public

A new virtual model of our planet could help resolve lingering climatic uncertainties