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Planetary Defense
Fears of celestial collisions — and calculations of their likelihood — go back to the very origins of modern science itself.
Asteroid 2024 YR4, which could devastate a city's worth of humans, has gone from 1.2% to 2.3% to 2.6% to 3.1% chances of impact. Here's why.
Peaking on the night of August 11/12, up to 100 bright meteors per hour will be visible. Here's how to make the most of it.
Meanwhile meteorite hunters rushed to Berlin to find this most rare space rock.
The asteroid is expected to come within 140,000 miles of Earth — well inside the moon’s orbit.
Some of them have survived the wilds of space for billions of years.
You can't throw a DART at everything in space.
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.
The largest hazardous asteroid found in the last 8 years showcases a little-known class of planet-killers. And we're woefully unprepared.
This technological feat changes our cosmic history.
Sooner or later, Earth is going to be hit by a large enough space object to cause significant damage to humanity. Stopping them isn't easy.
Spaceguard shows that we can manage risks to the extinction of humanity — if only we put our mind to it.
The surface of asteroid Bennu is more like a plastic ball pit than the Moon.
The James Webb Space Telescope (JWST) will study many dangerous cosmic phenomena, knowledge of which may help save humanity.
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.
60% of all potentially dangerous asteroids remain undetected.
65 million years ago, an asteroid strike caused the 5th great mass extinction. Could we save Earth, today, from a similar event?
In 2022, the probe will crash into an asteroid while a nearby satellite captures it on camera.
“Should they strike, each of them has an energy at impact equal to all of the nuclear weapons on Earth combined."
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 […]
Only 17 years after its discovery have we learned we’re safe from asteroid Apophis. Ever since its 2004 discovery, asteroid 99942 Apophis has threatened planet Earth. Asteroid Apophis has been measured […]
That’s not how probability works. Or asteroids, for that matter. “Bringing an asteroid back to Earth? What’s that have to do with space exploration? If we were moving outward from there, […]