Around the world in 80 telescopes: a space trivia quiz
This quiz explores the world's most powerful telescopes and observatories — on Earth and beyond.
Comet Lemmon lights up the sky over Spain | Space photo of the day for Nov. 11, 2025
This image captures Comet Lemmon in dramatic fashion, its bright coma and faint tail arcing across the starfield.
Does quantum gravity exist? A new experiment has deepened the mystery
Quantum gravity seeks to unify the theory of general relativity with quantum physics to describe how gravity works at very small scales. But there's a big puzzle surrounding the idea.
Sun unleashes strongest solar flare of 2025, sparking radio blackouts across Africa and Europe
The X5.1-class eruption from sunspot AR4274 is this year's most powerful solar flare and Earth is in the firing line.
Scientists 3D printed muscle tissue in microgravity. The goal is to make human organs from scratch
Scientists just 3D printed human muscle tissue in microgravity conditions. The ultimate goal is to make organs in space.
ESA’s sun spacecraft captures 1st close-up of our star’s magnetic engine in motion
"Solar Orbiter can now provide this missing piece of the puzzle."
Volcano belches ash over Chile | Space photo of the day for Nov. 10, 2025
The European Space Agency's Copernicus Sentinel-2 satellite mission captured a plume of ash over the Planchón-Peteroa volcanic complex.
Space.com headlines crossword quiz for week of Nov. 3, 2025: Which meteor shower peaked this week?
Test your space smarts with our weekly crossword challenge, crafted from Space.com’s biggest headlines.
Aging stars destroy their planets more often than we thought: What does this mean for Earth?
"We expected to see this effect, but we were still surprised by just how efficient these stars seem to be at engulfing their close planets."
No, interstellar comet 3I/ATLAS hasn’t ‘changed color’, scientist says
While media outlets have reported that curious interstellar comet 3I/ATLAS has changed color, the scientists behind a recent study say that isn't actually the case.