Space

Solar system comet C/2024 E1 (Wierzchos) makes its closest approach to the sun today (Jan. 20) during an event known as perihelion, when it will pass a little over half the Earth-sun distance from our parent star, causing it to brighten significantly. Comet Wierzchos makes its closest flyby at 1:24 p.m.EST (1824 GMT) on Jan. 20, passing the sun at a distance of 52.6 million miles (84.6 million…

Full-halo CME from the X1.9 flare. The three bright specks of light (left to right) are Venus, Mercury and Mars. (Image credit: NOAA Space Weather Prediction Center) The sun sure has woken up this week, unleashing a powerful X-class solar flare on Jan. 18 that hurled a colossal, fast-moving coronal mass ejection (CME) directly toward Earth. That CME has now arrived, triggering severe (G4)…

Stars don’t start out fully formed. Instead, they begin when clouds of diffuse gas and dust clump together, becoming denser than their surroundings. Gravity does the rest, pulling material inward until a collapsing knot becomes a compact, warming core: a protostar, still feeding on the cloud that created it. That’s exactly what was seen in a recent image from NASA’s and the…

“Dark stars” could help solve three seemingly disconnected mysteries that emerged at cosmic dawn — mysteries recently discovered by the James Webb Space Telescope. The puzzles include the surprising overabundance of supermassive black holes in the early universe, the unexpected existence of “blue monster” galaxies, and the so-called “little red dots&#8221…