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Galaxy Formation
It might seem puzzling, in a Universe bound by the speed of light, that this could be true. Here’s the science behind it. If you look out into the distant Universe, […]
Young galaxies are bright and blue; old galaxies are red and dead. So how did this old, red galaxy form so early? The observable Universe contains two trillion distinct galaxies, but […]
Our Universe is 13.8 billion years old, and our Sun formed about 2/3rds of the way through. Here’s what came before it. When it comes to the great cosmic question of […]
If this newfound galaxy is just the tip of the iceberg, the entire Universe may fall into place. One of the greatest challenges for a scientist is that every time you […]
There’s so much we don’t know about fast radio bursts and galactic halos. Combined, we get a unique window on the Universe. Deep in space, mysterious signals known as Fast […]
When stars get ejected from galaxies within massive clusters, they go where the dark matter is. Dark matter is one of the greatest mysteries in the Universe, displaying its effects in […]
Some galaxies might not have any dark matter. Here’s why you should care. There are two assumptions that everyone makes about the Universe for extremely good reasons, but they might not […]
At the core of the largest star-forming region of the Local Group sits the biggest star we know of. Mass is the single most important astronomical property in determining the lives […]
Has the mystery really been solved? Doubtful. The real science goes much deeper. For perhaps the last year or so, a small galaxy located not too far away has captivated the […]
Depending on how you measure it, there are two different answers that could be right. If you want to see what’s out there in the Universe, you first have to be […]
There was a first molecule, and we found one just like it. But there’s a big difference. The Universe’s first molecule is found at last! That’s what the headlines have […]
What happened 4.56 billion years ago is the most important part of the cosmic story ever to happen to us. If you were to look at our Universe at the time […]
If we were in a place like the Coma Cluster instead of the Local Group, we’d already be dead. In a living spiral galaxy, like the Milky Way, the rich gas […]
A rare, ultra-diffuse galaxy is full of stars and not much else. Here’s how to make sense of it. One of the greatest puzzles in the entire Universe is the dark […]
Dark matter is one of the most puzzling, unintuitive concepts in all of physics. But we still need it. Our Universe isn’t like us. While we’re made of atoms, and other […]
Despite being 28 years old and having a gyroscope failure, Hubble still delivered these 10 amazing snapshots in 2018. Year after year since its 1990 launch, Hubble keeps revolutionizing our view […]
The Universe began almost perfectly uniform, while today, it’s anything but. Here’s how we grew up. One of the strangest facts about the Universe is how dramatically its changed over time. […]
The first planets were only gas. The second included rocky ones, but life wasn’t possible. Here’s how we finally got there. Here in the Universe today, potentially habitable planets are practically […]
Galaxies are found uniformly everywhere in the Universe, except in the Milky Way’s plane. Here’s why. From the time of their very first discovery, the Universe’s grand spirals have puzzled astronomers. […]
For more than 10 billion years, the star-formation rate across the Universe has been plummeting. Here’s the story. Take a look at a wide variety of galaxies in the Universe, and […]
The cosmic story of us, from before the Big Bang until today, is a story that all of us share. Enjoy it, in just 200 words. In the beginning, there was […]
Hubble holds the record, finding a galaxy when the Universe was just 3% it’s age. In just a few years, James Webb will shatter it. One of the great scientific lessons […]
It took more than 9 billion years for Earth to form: the only known planet housing life. But it could have happened much, much sooner. The cosmic story that unfolded following […]
They may have arisen less than 200 million years after the Big Bang, but the Universe was a very different place back then. When you look out beyond the Milky Way […]
Billions of years from now, dark energy will push the rest of the Universe out of reach forever. These galaxies will be the last to go. A look at the night […]
Dark matter is our leading theory for a reason. New, detailed studies of the smallest galaxies could kill off the most studied alternative. When you look out at the Universe, […]
It took hundreds of thousands of years to make atoms for the first time. If things were just a little different, it could have taken an eternity. When it comes […]
The most massive star in the known Universe is 260 times as heavy as our Sun. But viewing the early Universe will shatter that record. Place enough mass together in one […]
The Universe is an enormous place, but we can’t see all the way back to the beginning. Here’s the latest record-breaker. No matter how far back we look in the […]
It wasn’t just the Milky Way and Andromeda two billion years ago. Here in the Local Group, our two largest galaxies dominate: Andromeda and the Milky Way. Our Local Group of […]