University of Michigan astronomers say a hyper-runaway star didn’t originate from the galaxy’s center, as previously believed. Instead, they say, a cluster of young stars booted it from the galaxy’s disk.
Opportunity – nicknamed “Oppy” – was active on Mars from 2004 until June, 2018, when a planet-wide dust storm covered it. Its final image is a panorama, acquired from Opportunity’s final resting place in Mars’ Perseverance Valley.
They used the ALMA telescope to observe a slow outflow and a high speed jet from a newly forming star. These two streams appear misaligned and were apparently launched from different parts of the star-forming disk.
There are at least 200 billion stars in our galaxy, and perhaps even a greater number of planets. Now a new study suggests there could be an additional 50 billion rogue planets, not orbiting any stars.