Scientists recently discovered an asteroid that tags along with Earth during its yearly journey around the sun. Dubbed 2023 FW13, the space rock is considered a “quasi-moon” or “quasi-satellite,” meaning it orbits the sun in a similar time frame as Earth does, but is only slightly influenced by our planet’s gravitational pull. It is estimated … Read more
The universe has a speed limit, and it’s the speed of light. Nothing can travel faster than light — not even our best spacecraft — according to the laws of physics. So, what is the speed of light? Light moves at an incredible 186,000 miles per second (300,000 kilometers per second), equivalent to almost 700 … Read more
On June 30, 1908, an asteroid flattened an estimated 80 million trees in Siberia over 830 square miles (2,150 square kilometers). Dubbed the Tunguska event, it is considered the biggest asteroid impact in recorded history. Yet no one has ever found the asteroid fragments or an impact site. The asteroid lit up the skies in … Read more
Space is famously considered the “final frontier” — but what part of space are we even talking about? Space, outer space and deep space are used somewhat interchangeably in many contexts, but astronomers have come up with clear distinctions between them. So, what’s the difference between them? The term outer space refers to anything beyond … Read more
Scientists caught Saturn’s icy moon Enceladus spraying a “huge plume” of watery vapor far into space — and that plume likely contains many of the chemical ingredients for life. Scientists detailed the eruption — glimpsed by the James Webb Space Telescope (JWST) in November 2022 — at a conference at the Space Telescope Science Institute … Read more
Rest easy: Earth probably won’t be creamed by a killer asteroid in the next 1,000 years. New research accepted for publication in The Astronomical Journal and available on the preprint server arXiv.org finds that none of the kilometer-wide (0.6 mile) asteroids that travel near Earth are likely to hit the planet in the next millennium. … Read more
Astronomers have spotted a star devouring one of its planets for the first time. It is a stunning preview of our own planet’s fate, when, in roughly 5 billion years time, Earth too will likely be engulfed by our rapidly expanding sun. The distant planet met its gory demise 13,000 light-years from Earth around a … Read more
Gravity can turn itself into light, but only if space-time behaves in just the right way, a research team has found. Under normal circumstances, you cannot get something from nothing. Specifically, the Standard Model of particle physics, the reigning theory that explains the subatomic zoo of particles, usually forbids the transformation of massless particles into … Read more
Neptune is famously a vivid blue, but the asteroids orbiting near it are decidedly not. An international team of astronomers recently took a peek at Neptune’s Trojan asteroids and found that they all seem to be some shade of red — far redder than most asteroids in the solar system. They published their results Feb. … Read more
Five years ago, NASA’s infrared Spitzer Space Telescope helped discover a family of seven rocky exoplanets orbiting the same star, known as TRAPPIST-1. Now, NASA’s new infrared powerhouse — the James Webb Space Telescope (JWST) — measured the temperature of one of those worlds, TRAPPIST-1b, in new research published in the journal Nature. The bad … Read more
