The largest hazardous asteroid found in the last 8 years showcases a little-known class of planet-killers. And we're woefully unprepared.
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A surprising JWST discovery around Fomalhaut has a different, superior explanation: not a great dust cloud, but a mere background object.
65 million years ago, a massive asteroid struck Earth. Not only did Jupiter not stop it, but it probably caused the impact itself.
The nearby, bright star Fomalhaut had the first optically imaged planetary candidate. Using JWST's eyes, astronomers found so much more.
Back in 1990, we hadn't discovered a single planet outside of our Solar System. Here are 10 facts that would've surprised every astronomer.
In 2020, scientists took more than a kilo of moon rock and soil back to Earth for testing.
Do you think you know the Solar System? Here's a fact about each planet that might surprise you when you see it!
The secret ingredient is violence, and it just might indicate that "moonmoons" aren't as uncommon as most astronomers think.
The James Webb Space Telescope (JWST) will study many dangerous cosmic phenomena, knowledge of which may help save humanity.
Can two planets stably share the same orbit? Conventional wisdom says no, but a look at Saturn's moons might tell a different story.
This technological feat changes our cosmic history.
65 million years ago, an asteroid strike caused the 5th great mass extinction. Could we save Earth, today, from a similar event?
Pluto failed to meet the definition of a planet, but some astronomers think there might be a legitimate Planet 9 out there.
How did the troughs form?
Most potentially hazardous asteroids remain unidentified. NEO surveyor could change that, but only if it's funded, and soon.
The recently discovered Oort cloud comet, Bernardinelli–Bernstein, has the largest known nucleus: 119 km. Here's what it could do to Earth.
A Harvard astronomer went to the bottom of the ocean, claiming he recovered alien technology. But what does the science actually indicate?
And what can it teach us about our Solar System’s earliest days? In many ways, astronomy is unique among the sciences. In every other field, you have the ability to design […]
A conversation with an advanced alien species is likely to be simple and to take 1,000 years. It might also be dangerous.
And the one step we can take to show extraterrestrials we’re figuring it out. Every year, Earth’s meteor showers accomplish two important tasks. This composite photograph shows a large number of […]
From here on Earth, looking farther away in space means looking farther back in time. So what are distant Earth-watchers seeing right now?
Scientists find routes using arches of chaos that can lead to much faster space travel.
Massive objects like black holes, stars, and rogue planets routinely pass near our Solar System. An ensuing comet storm could destroy us.
Yes, NASA's Perseverance rover found organics on Mars. So did Curiosity. Unfortunately, that doesn't mean anything in the search for life.
Compared to Earth, Mars is small, cold, dry, and lifeless. But 3.4 billion years ago, a killer asteroid caused a Martian megatsunami.
If there are human-sized creatures walking around on other planets, would we be able to view them directly?
Phobos and Deimos only have two explanations, and neither one adds up.
Each year in mid-August, Earth plows through the debris stream of an enormous comet, creating the Perseids. 2023's show will be magnificent!
Once science operations begin for James Webb, we'll never look at the Universe the same way again. Here's what everyone should know.