When mountaineers climb Mount Everest, they routinely carry oxygen cylinders, devices that allow them to breathe freely at high altitudes. This is necessary because the closer you get to the edge of Earth’s atmosphere, the less oxygen there is available compared with the plentiful amounts found at sea level. This is just one example of … Read more
Astronomers have discovered a perplexing trend in Neptune’s atmosphere: Ever since the planet’s southern hemisphere summer began almost two decades ago, atmospheric temperatures in this region have plummeted, and scientists aren’t sure why. Neptune is the most distant planet in the solar system, around 30 times farther from the sun than Earth is. Just like … Read more
So far no one has found evidence of intelligent aliens elsewhere in the cosmos. But if they do exist, they might be hanging out on Dyson spheres circling the husks of sunlike stars called white dwarfs scattered throughout the Milky Way, a new paper argues. And that’s there we should be focusing our search for … Read more
Venus is a hot and hellish world and the second planet from the sun. The Earth-size planet could be considered our twin if not for its thick, toxic atmosphere and surface temperatures that are hot enough to melt lead. Despite such extremes, researchers have long wondered if organisms could exist in the upper cloud layers … Read more
The Milky Way is home to millions of potentially habitable planets — and approximately four of them may harbor evil alien civilizations that would invade Earth if they could, new research posted to the preprint database arXiv (opens in new tab) suggests. The new paper, which has not yet been peer-reviewed, poses a peculiar question: … Read more
NASA’s marsquake-hunting lander has detected its two largest seismic events to date — and on the far side of the planet, no less. NASA’s InSight lander touched down on Mars in November 2018 carrying the most sensitive seismometer ever designed. Since the mission’s arrival, it has detected countless events dubbed marsquakes, using the signals to … Read more
A new warp speed experiment could finally offer an indirect test of famed physicist Stephen Hawking’s most famous prediction about black holes. The new proposal suggests that, by nudging an atom to become invisible, scientists could catch a glimpse of the ethereal quantum glow that envelops objects traveling at close to the speed of light. … Read more
NASA has released a stunning image of a unique crater on Mars with strange, luminous ridges that give it the appearance of a human fingerprint. The crater in the photo is known as Airy-0, a 0.3-mile-wide (0.5 kilometer) depression that sits within the much larger Airy crater, which is around 27 miles (43.5 km) wide. … Read more
In space, rockets zoom around with no air to push against. What’s their secret? Turns out, the engines that power rockets are different than the kind of engines that power aircraft or other Earth-based equipment. Rocket engines carry everything they require into space, rather than relying on air. Like Earthly engines, rocket engines operate using … Read more
Uranus, the seventh planet from the sun, was the first planet to be discovered using a telescope. It is an odd world that tilts over on one side, with thin rings and dozens of moons. In 2022, Uranus was selected by planetary scientists as a top target in the solar system for exploration, and NASA … Read more
