SUNSET: 
Scientists Map the Sun’s Magnetic “Surface”
Where does the Sun end and the solar wind begin? Scientists have mapped the dynamic magnetic edge that bounds our star.
Geminid Meteor Shower Peaks December 13-14
Great news! We'll have dark skies for the year's richest meteor shower.
The Sun's Poles Are Different Than We Expected
A new analysis of the Solar Orbiter's unique views of the Sun's poles shows how a "conveyor belt" moves within our nearest star.
Tiny Sparks of Lightning Detected on Mars for the First Time
The microphone on NASA's Perseverance rover unexpectedly heard tiny claps of thunder from sparks caused by colliding dust grains.
Updates on Interstellar Comet 3I/ATLAS: NASA Images, Many Tails, and Non-gravitational Forces
Now that Comet 3I/ATLAS has emerged from the Sun's glare, its behavior is being monitored by every available observatory.
Double Solar Eruptions Spark Widespread Aurora
Last night's aurora painted the sky in reds, greens and even oranges. It's expected to return tonight!
Near-Earth Asteroids Spin Faster Than We Thought
The fast spin of small near-Earth asteroids suggests scientists need to revise their ideas about what holds these rocky bodies together.
Newly Discovered Asteroid Circles the Sun Inside Venus’s Orbit
Astronomers have discovered a second asteroid in the inner solar system, circling the Sun almost entirely within the orbit of Venus.
Objects at the Edge of the Solar System Behave in an Unexpected Way
In a surprise to researchers, the small, icy bodies beyond Pluto's orbit tend to rotate opposite the way they move around the Sun, which might say something about how they formed.
New Study Identifies Organic Molecules Spewing from Saturn's Icy Moon Enceladus
The discovery of a new array of molecules spouted from Enceladus indicates new promise for habitability within its frozen-over ocean.
Dip a Toe in the Orionid Meteor Stream on Oct. 20-21
Circumstances are ideal for watching debris from Halley's Comet set the morning sky ablaze.
Mars Orbiters' Front-row Seats to the Interstellar Comet
Spacecraft orbiting the Red Planet will aim a suite of instruments at Comet 3I/ATLAS to capture details about this enigmatic object.
Two Bright Comets Converge on Northern Hemisphere Skies
After a dearth of bright comets earlier this year, we look forward to an exciting month ahead.
NASA's VIPER Mission Has Found Another Ride to the Moon
VIPER, a water-seeking rover, has gotten a new lease on life, with a new launch vehicle and lander announced by NASA.
Last Call for a Remarkable Titan Shadow Transit
Titan joins its shadow for a "grand finale" this October.
Did Asteroids Once Rain Down on Earth?
A surge of asteroids might have peppered the inner solar system some 800 million years ago, in a short-lived shower that left its mark — literally — on Earth and its neighbors.
Mars Might Have a Surprisingly Large, Solid Core, Marsquakes Reveal
Marsquakes reveal a lumpy, viscous mantle and a large, solid inner core, with profound implications for Mars past, present, and future.
Webb Telescope Finds Interstellar Comet Has Unexpected Composition
Observations with the James Webb Space Telescope have shown the new interstellar Comet 3I/ATLAS is surprisingly rich in carbon dioxide.
Meet 2025 PN7, Earth’s New Quasi-moon
Just discovered, it’s been orbiting the Sun alongside Earth for decades, and will continue to do so for decades more
Jupiter-bound Probe Flies By Venus
The European spacecraft en route to Jupiter, named JUICE, completed its only flyby of the planet Venus
