If a fetus is a person, would it be a citizen too?
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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 […]
The two planets most suited for habitability had very different fates. At last, scientists know why. Imagine the early days of our Solar System, going back billions of years. The Sun […]
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 […]
There are a lot of unsolved mysteries in the Universe, but dark energy is the most confusing. Here’s why. The majority of the energy in our Universe went completely undiscovered until […]
In order to reap the greatest rewards, we have to think big and invest big. One of these four missions will deliver like never before. When it comes to exploring the […]
Schadenfreude is a common feeling, but not all of it is the same.
These three reasons are why there’s no getting around the fact that astronomy needs the James Webb Space Telescope. Even the most powerful telescope in history, the Hubble Space Telescope, […]
You’d be amazed at what you can learn from even one single pixel. Over the past decade, owing largely to NASA’s Kepler mission, our knowledge of planets around star systems beyond […]
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 […]
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 […]
From the inflationary state that preceded the Big Bang to our cold, lonely, dark energy-dominated fate, the Universe goes through six different eras. We’re living in the last one already. The […]
With thousands of discovered planets around stars beyond our own Sun, why haven’t we found the next Earth? Over the past 30 years, astronomers have gone from zero known extra-solar planets […]
Two massive clouds of dust in orbit around the Earth have been discussed for years and finally proven to exist.
We know that life is possible on an Earth-like world around a Sun-like star. But can it find a way on a Super-Earth? When it comes to the origin of […]
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 […]
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 […]
We’ve put so much together about the Universe. Could it all come tumbling down? We’re always on the lookout for the next big thing, and even our best guesswork is often […]
Theoretical work tells you where to look, but only experiments can reveal what you’ll find. There are fundamental mysteries out there about the nature of the Universe itself, and it’s our […]
For hundreds of millions of years, most of the starlight never made it through space. Here’s how that changed. Forming stars sounds like the easiest thing in the Universe to do. […]
The cosmic records we have are meant to be broken, but oh, have we ever gone so far. The great cosmic abyss contains more that humanity can ever hope to see, […]
The picture itself is breathtaking. But what we learn is truly eye-opening. Galaxy clusters, like the massive one captured here by Hubble, PLCK G004.5–19.5, impress not just for their looks, […]
The Big Bang happened everywhere at once, but stars are a different story. The Universe, back at its inception, was almost perfectly identical everywhere. It was the same high temperature […]
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 […]
The current record-holder is a doozy, and right at the limit of what Hubble can do. But there’s even more out there. The greatest advances in science often come when we […]
If we don’t invest in learning about the Universe, we aren’t going to learn very much. Every ten years, the field of astronomy and astrophysics undergoes a Decadal Survey. This charts […]
Even before we have the James Webb Space Telescope, a controversy over when the first stars formed is growing. As far back as our most powerful telescopes have ever looked, we’ve […]
Hubble telescope celebrates 28 years of being a space sleuth with these dazzling images of the Lagoon Nebula, 4,000 light-years away.