Most potentially hazardous asteroids remain unidentified. NEO surveyor could change that, but only if it’s funded, and soon.
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Can two planets stably share the same orbit? Conventional wisdom says no, but a look at Saturn’s moons might tell a different story.
NASA is creating a planet habitability index, and Earth may not be at the top. With our current data, ranking habitability is guesswork.
Yes, the magnetosphere is weakening. It does that from time to time.
Quite a lot, actually, even though it has no identifiable value as a scientific concept.
The far side of the Moon is incredibly different from the Earth-facing side. 63 years later, we know why the Moon’s faces are not alike.
The Crab Nebula goes back to 1054, opening a window into our cosmic past. On July 4, 1054, Chinese astronomers recorded a “guest star” in the Taurus constellation. A ‘guest star’ […]
On the morning of June 30, 1908, an explosion of more than 10 megatons occurred above the sparsely populated Siberian Taiga. What caused the so-called Tunguska event?
Should we be searching for life on other planets, or technology?
The most unique interloper into our Solar System has a natural explanation that fits perfectly — no aliens required.
Halley’s comet only visits every ~76 years, but its meteors arrive twice each year. The most famous comet of all — Halley’s comet — returns to our inner Solar System every ~76 years. Halley’s comet […]
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.
Aerial drone footage was sent to an AI trained to track down space rocks.
The acceptance of our cosmic loneliness and the rarity of our planet is a wakeup call.
We once thought the Moon was completely airless, but it turns out it has an atmosphere, after all. Even wilder: It has a tail of its own.
Contrary to common experience, not everything needs a medium to travel through. Overcoming that assumption removes the need for an aether.
A conversation with an advanced alien species is likely to be simple and to take 1,000 years. It might also be dangerous.
In logic, ‘reductio ad absurdum’ shows how flawed arguments fall apart. Our absurd Universe, however, often defies our intuitive reasoning.
If you want to understand what the Universe is, how it began, evolved, and will eventually end, astrophysics is the only way to go.
Scientists find routes using arches of chaos that can lead to much faster space travel.
Scientists should be cautious when expressing an opinion based on little more than speculation.
Probably not. Even though we’re still investigating the origin of life, the evidence suggests that cells came much later.
Scientists do not know what is causing the overabundance of the gas.
Avi Loeb says it’s aliens. Every other astronomer disagrees. Here’s why. In 2017, an astronomical event occurred that was unlike any other: for the first time, we observed an object that […]
The stars, planets, and many moons are extremely round. Why don’t they take other shapes?
For the first time in many years, there’s currently a comet visible to the naked eye in Earth’s night sky: comet NEOWISE. For the first time in many years, there’s currently […]
For northern hemisphere skywatchers, it might just be the century’s best comet so far. Every once in a while, large, icy objects pass through the inner Solar System. C/2014 Q2 (Lovejoy) […]
No matter how you define the end, including the demise of humanity, all life, or even the planet itself, our ultimate destruction awaits.
Harvard astronomer Avi Loeb claimed to track down and find alien spherules on the ocean bottom. Here’s the sober truth.
Many have argued that free will is an illusion, but science does not support that.