NASA astronaut Mike Fincke will set an agency record when he makes his 10th ever spacewalk Jan. 8, 2026, along with Zena ...

Since its discovery, some people have speculated that interstellar visitor 3I/ATLAS could be alien technology. Harvard astrophysicist Avi Loeb points to its unusual trajectory and composition as ...

In 2017, we spotted our first ever visitor from another star system: 'Oumuamua. This bizarre object moved at impossible speeds, had a strange cigar shape, and behaved like nothing in our solar system.

Southwest Research Institute's novel Compact Dual Ion Composition Experiment (CoDICE) instrument aboard NASA's Interstellar Mapping and Acceleration Probe (IMAP) spacecraft has successfully collected ...

A comet from another star system is due to make its closest—and final—approach to Earth this week before it continues on its journey back toward interstellar space. Interstellar Comet 3I/ATLAS will ...

A stray comet from another star swings past Earth this week in one last hurrah before racing back toward interstellar space. Discovered over the summer, the comet known as 3I/Atlas will pass within ...

For months now, astronomers have been closely watching the mysterious interstellar object 3I/ATLAS as it rips through the solar system at a breakneck velocity. And before it finally leaves us for good ...

The comet is the third object ever confirmed to have entered our cosmic neighborhood from elsewhere in the galaxy. Space telescopes and orbiters have been documenting the rare visit. A mysterious ...

The Hubble Space Telescope and the Jupiter Icy Moons Explorer have captured fresh images of an interstellar comet as the object nears its closest approach to Earth later this month. Comet 3I/ATLAS has ...

An astrophotograph of the interstellar comet known as 3I/ATLAS highlights its green coma and a wandering blue-tinted ion tail. (Copyright Victor Sabet and Julien De ...

As another interstellar visitor approaches Earth, we look back at ʻOumuamua — the first of its kind and one of greatest modern mysteries of astronomy. Grandfather, 3-month-old granddaughter dead after ...

Time moves fast. 260 years can zip by in the blink of an eye. That’s how long it took me to fly from the failing Earth of the far future to humanity’s new home upon the Interstellar Arc. One second, I ...