NASA launches science balloon in Antarctica | Space photo of the day for Dec. 22, 2025
The first scientific balloon flight happened on Dec. 16, 2025.
Farewell, comet 3I/ATLAS! Interstellar visitor heads for the outer solar system after its closest approach to Earth
3I/ATLAS has now made its closest approach to the sun and Earth and is now heading back out toward the outer solar system.
How did interstellar comet 3I/ATLAS capture our imagination in 2025?
For one, it came down to timing.
Scientists detect X-ray glow from interstellar comet 3I/ATLAS extending 250,000 miles into space
A rare interstellar comet has been caught in X-rays by two space telescopes, revealing how its gases interact with charged particles from the sun as it travels through the inner solar system.
What time will interstellar comet 3I/ATLAS be closest to Earth today?
NASA JPL pinpoints the moment the interstellar visitor passes closest to our planet.
Camera on NASA Mars probe snaps its 100,000th photo of the Red Planet
The HiRISE camera on NASA's Mars Reconnaissance Orbiter just notched a big milestone, snapping its 100,000th photo of the Red Planet.
Watch interstellar comet 3I/ATLAS make its closest approach to Earth in free livestream on Dec. 19 after rain delay
The livestream will now begin Friday at 11 p.m. EST, Dec. 19 (0400 GMT on Dec. 20), weather permitting, after rain prevented a broadcast on Thursday night.
Latest Comet 3I/ATLAS news: Comet close approach today
Friday, Dec. 19, 2025: Your daily feed for the holiday flyby of interstellar comet 3I/ATLAS by Earth.
Interstellar comet 3I/ATLAS wasn’t supposed to be there — meet the astronomer who discovered it
Dr. Larry Denneau of the University of Hawaii is nothing like your typical astronomer.
Wildfire smoke lofted miles high could have an unexpected effect on Earth’s climate
New measurements demonstrate that smoke particles in the upper atmosphere are twice the size of lower-altitude ones.