Physicist: Probably nothing. We do know that the universe doesn’tneedanything to expand into, and we haven’t seen any evidence that there is anything outside of the universe. But there has still been some speculation. In the last hundred years physics has gotten pretty weird, and...
Come on, admit it, you’ve had this question. “Since astronomers know that the Universe is expanding, what’s it expanding into? What’s outside of the Universe?” Ask any astronomer and you’ll get an unsatisfying answer. We give you the same unsatisfying answer, but really explain it...
If still you don’t know that we live in an expanding Universe, then I’m clearly not doing my job. And so once more, with feeling… the Universe is expanding. But that certainly doesn’t answer all the questions that go along with the it. Remove All Ads on Universe Today Join our ...
The cosmological horizon is caused by the expansion of the universe. You can picture this as being like ants crawling on a balloon. As the balloon expands only ants that are close to each other will be able to run into each other; more distant ants can crawl at each other at full sp...
But, for all of it, the Universe isstill expanding. What's amazing is, despite all of the things that could cause this expansion, there's onlyonething that the expansion rate depends on. Know what it is? Theenergy densityof the Universe. Or, in other words, the total amount of matter...
The center of my universe is the pun, not the sun. (I’ll pause for your laughter.) But despite this deep-rooted love, I know clarity is non-negotiable when it comes to content writing. To effectively offer value to an audience and have them grasp a message, they need to understand ...
The Universe hasmore matterand is expandingmore slowlythan we previously thought! If you had asked me yesterday I wouldn't have predicted the Hubble constant to be this low. In fact, Ididsaythis: It probably couldn’t be as low as 60 or as high as 80, but no one would beshocked...
Matter—the visible kind, that is—interacts with the universe in many ways. It absorbs and, in many cases, emits electromagnetic radiation in the form of gamma rays, visible light, infrared, and more. It can generate magnetic fields of various sorts and strengths. Matter has mass, creating...
Webb is known for its ability to stare unblinking into the deep sky. Since it came online, it has produced deep-field images containing thousands of distinguishable galaxies and narrow profiles of individual stars—and its repertoire is still expanding. In June 2024, JWST astronomers presented the...
The last message they received was basically, ‘My battery is low and it’s getting dark.’— Jacob Margolis In its life, Opportunity was responsible for taking more than 217,594 raw images of Mars. According to Margolis, it shares credit with all the rovers for expandin...