The more we explore, the more questions arise. Is the Universe infinite or does it have a boundary? Only time and further discoveries may reveal the true extent of the cosmos.

But in the universe, they’re interwoven into a single fabric, called “ space-time.” That unification changes the way the universe works relative to what our intuition expects.

However, we can't extract energy out of the vacuum and use it to do work. That's because whatever its value is, it is the lowest energy state possible for the universe. To get work done, you have ...

If you have a question you’d like an expert to answer, send it to [email protected]. Why is space so dark despite all of the stars in the universe? – Nikhil, age 15, New Delhi ...

Nothing traveling through space is faster. To put that into perspective: In the time it takes you to blink your eyes, a particle of light travels around the circumference of the Earth more than twice.

Two blind spots torture physicists: the birth of the universe and the center of a black hole. The former may feel like a moment in time and the latter a point in space, but in both cases the normally ...

I remember when NASA published the first ever image of a black hole. I sat at my kitchen table staring at my computer screen at the blurry red donut of light, the remnants of some massive star, ...

The Vera C. Rubin Observatory stands atop a mountain peak in Chile, from which its telescope and camera will capture extraordinary information about our universe over the next 10 years as part of the ...

View the first images from the Vera C. Rubin Observatory in Chile with the world’s largest digital sky survey camera, opening a new era in astronomy.

Before JWST turned on, Casey said, she and fellow astronomers made their best predictions about how many more galaxies the space telescope would be able to see, given its 6.5 meter (21 foot ...