Thick sheets of water ice, some barely buried beneath the surface and likely more than 100 meters thick, have been spotted on several Martian cliff faces.
They look like leftover gravel from a freshly laid asphalt road, but the black stones that spattered across the snow in the wake of the January 16th Michigan fireball were anything but terrestrial. They belonged to a tiny asteroid on a recent foray to the outer asteroid belt but now grounded for good on Earth.…
An unassuming amateur astronomer forever linked to one of the greatest comets in modern history has passed away.
A new theory of the solar system’s formation suggests that it formed within the shell of a wind-blown bubble surrounding a dead star.
Astronomers' recent observations of our first-known interstellar visitor reveal that it is very strange indeed.
Here's a quick look at results announced at the 2017 American Geophysical Union meeting in New Orleans: exploding meteoroids, Saturn's ring-atmosphere connection, and more bright spots on Ceres.
New analysis from the New Horizons team suggest that the spacecraft's next target in the Kuiper Belt might have a third companion.
NASA’s Juno spacecraft peeked under the clouds of the most iconic weather feature in the solar system, Jupiter’s Great Red Spot, revealing a complex structure deep below the surface.
A new analysis reveals that the gigantic impact that led to the Moon's formation might have also switched on Earth's magnetic field.
NASA is developing a key instrument for a mission to the Martian moons, Phobos and Deimos.
Rapid-response observations by major observatories shows that the first-known interstellar visitor is 10 times longer than it is wide.
The arrival of an object from beyond the solar system caught astronomers by surprise — but that doesn't mean that they were unprepared to study it.
Observations from NASA's MAVEN spacecraft reveal that the solar wind causes unexpected interactions with the Red Planet's weak magnetism.
An upcoming study will take the old calibration standard of the Moon's brightness to a new level of precision.
Telescopes only picked it up a week ago, but it's likely been traveling through interstellar space for millions of years.
A professional observatory in Greece has begun recording flashes created when bits of interplanetary debris strike the Moon.
You'd think scientists would have Saturn all figured out after watching it up close for 13 years. They don't.
When the distant dwarf planet Haumea briefly slipped in front of a star last January, astronomers found more than they expected.
Roughly 3.5 billion years ago huge volcanoes released enough gas to cover the Moon with a thin atmosphere that was visible from Earth.
The close pass of near-Earth asteroid 2012 TC4 this week will give NASA a chance to test planetary-defense coordination.
Here’s an opportunity for amateurs to help improve our understanding of Neptune’s moon Triton.
The 2017 solar eclipse could easily be the most watched event in US history. Can we learn something from it?
A new analysis maps out water across the lunar surface, revealing how its abundance changes with latitude.
After 13 years of orbiting the Saturn system, and 4.9 billion miles logged, the Cassini mission has ended, vaporized on re-entry into the ringed planet.
As Cassini dives into Saturn's atmosphere this Friday, ending 13 years of exploration, expect to probe the ringed planet's mysteries as never before.