New 3I/ATLAS images from NASA and the ESA suggest the interstellar comet is active as it approaches Earth in December.

Go outside right now. What’s the farthest thing you can see? A tree? A bird? What about the Moon? It’s 250,000 miles away. The Sun is 400 times farther than that, at nearly 100 million miles (but ...

Astrophotography has shifted from a niche pursuit to a mainstream hobby, and the telescope you choose now matters as much as ...

The next great space telescope will study distant galaxies and faraway planets from an orbital outpost about a million miles from Earth. But first it has to be put together, piece by piece, in a ...

The National Solar Observatory on Mt. Haleakala recorded this high-resolution image of a solar flare on the sun. According to the observatory, the image is about four Earth-diameters on each side.

On March 11, 2025, a SpaceX Falcon 9 rocket lifted off from Space Launch Complex 4 East at Vandenberg Space Force Base in California. Among other things, it carried with it something that will ...

Seeing the stars or the moon doesn’t have to be complicated; even a beginner can do it with the right scope. By John Alexander Published Feb 27, 2025 9:15 AM EST We may earn revenue from the products ...

Use code SMART to get a Vespera Pro Smart Telescope on sale for $2,490 (reg. $2,990). StackSocial works with a variety of ...

answer one of their most burning questions about how the Sun works: how its outer atmosphere (corona) heats up to over one million degrees Celsius (1.8 million Fahrenheit), 100 times hotter than the ...

At the end of 2021 humanity launched into a distant orbit the most technologically advanced (and expensive) space telescope ever made. Now parked at the second Sun-Earth Lagrange point (L2) in the ...