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Unexpected images of galaxies from the James Webb Space Telescope do not disprove the Big Bang. There are other likelier explanations.

With a finite 13.8 billion years having passed since the Big Bang, there’s an edge to what we can see: the cosmic horizon. What’s it like?

Since dark matter eludes detection, the mission will target sources of light that are sensitive to it.

From inside our Solar System, zodiacal light prevents us from seeing true darkness. From billions of miles away, New Horizons finally can.

If there are human-sized creatures walking around on other planets, would we be able to view them directly?

The structure of our Solar System has been known for centuries. When we finally started finding exoplanets, they surprised everyone.

Einstein’s relativity teaches us that time isn’t absolute, but passes relatively for everyone. So how do telescopes see back through time?

With JWST, Chandra, and gravitational lensing combined, evidence has emerged for the earliest black hole ever. And wow, is it a surprise!

When we see pictures from Hubble or JWST, they show the Universe in a series of brilliant colors. But what do those colors really tell us?

After years of analysis, the Event Horizon Telescope team has finally revealed what the Milky Way’s central black hole looks like.

The first set of James Webb’s images blew us all away. In just 2 mere months, it’s seen highlights that no one could have predicted.

The James Webb Space Telescope is about to begin science operations. Here’s what astronomers are excited about.

With a telescope at just the right distance from the Sun, we could use its gravity to enhance and magnify a potentially inhabited planet.

The James Webb Space Telescope viewed Neptune, our Solar System’s final planet, for the first time. Here’s what we saw, and what it means.

DESI has allowed astronomers to create an unprecedented 3D map of the Universe representing 20% of the entire sky.

Figuring out the answer involved a prism, a pail of water, and a 50 year effort by the most famous father-son astronomer duo ever.

It was supposed to have a 5.5-10 year lifetime, and take 6 months to calibrate. It’s performing better than anyone anticipated.

There’s no upper limit to how massive galaxies or black holes can be, but the most massive known star is only ~260 solar masses. Here’s why.

The standard model of cosmology has a big new problem: Some galaxies seem to be too old.

Carl Sagan was far from the first to declare we are the children of ancient stars.

The closest known star that will soon undergo a core-collapse supernova is Betelgeuse, just 640 light-years away. Here’s what we’ll observe.

You would think that with all our technology, like the James Webb Space Telescope, we would know how big the Universe is. But we don’t.

“I hope we take a mindset where we are willing to look for weird life in weird places.”

From the present day all the way to less than 400 million years after the Big Bang, we’re seeing how the Universe grew up like never before.

It was barely a century ago that we thought the Milky Way encompassed the entirety of the Universe. Now? We’re not even a special galaxy.

JWST’s revolutionary views arrive in high-resolution at infrared wavelengths. Without NASA’s Spitzer first, it wouldn’t have been possible.

When we started imaging the Universe with Hubble, every star had four “spikes” coming from it. Here’s why Webb will have more.

Now that it’s fully commissioned, the James Webb Space Telescope begins its exploration of the Universe. Here are its first science images!

For 550 million years, neutral atoms blocked the light made in stars from traveling freely through the Universe. Here’s how it then changed.

In our Solar System, even the two brightest planets frequently align in our skies. But only rarely is it spectacularly visible from Earth.