In the expanding Universe, different ways of measuring its rate give incompatible answers. Nobel Laureate Adam Riess explains what it means.
Search Results
You searched for: Telescope
A true scientific view of if, where, and when extraterrestrial life exists is within our grasp thanks to biosignatures and technosignatures.
2023 will see the launch of new rockets, the return of OSIRIS-REx, and a mission to Jupiter that could help us find extraterrestrial life.
In 1924, Edwin Hubble found proof that the Milky Way isn’t the only galaxy in the Universe.
Scientists can make substantial progress without fully understanding exactly what they’re doing.
Astronomy’s roots rest in the very origins of humanity. We have always looked to the skies for answers. We are starting to get them.
From inside our Solar System, zodiacal light prevents us from seeing true darkness. From billions of miles away, New Horizons finally can.
The structure of our Solar System has been known for centuries. When we finally started finding exoplanets, they surprised everyone.
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?
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?
With JWST, Chandra, and gravitational lensing combined, evidence has emerged for the earliest black hole ever. And wow, is it a surprise!
Since dark matter eludes detection, the mission will target sources of light that are sensitive to it.
DESI has allowed astronomers to create an unprecedented 3D map of the Universe representing 20% of the entire sky.
Einstein’s relativity teaches us that time isn’t absolute, but passes relatively for everyone. So how do telescopes see back through time?
If there are human-sized creatures walking around on other planets, would we be able to view them directly?
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.
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.
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 barely a century ago that we thought the Milky Way encompassed the entirety of the Universe. Now? We’re not even a special galaxy.
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.
“I hope we take a mindset where we are willing to look for weird life in weird places.”
After years of analysis, the Event Horizon Telescope team has finally revealed what the Milky Way’s central black hole looks like.
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.
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 is about to begin science operations. Here’s what astronomers are excited about.
The standard model of cosmology has a big new problem: Some galaxies seem to be too old.
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 supposed to have a 5.5-10 year lifetime, and take 6 months to calibrate. It’s performing better than anyone anticipated.