But all that dazzle comes at a cost. If left alone, the galaxies could keep on quietly churning out new stars year after year, sipping on their precious gaseous reserves. But the chaos of the collision forces them to use up precious supplies too quickly. Billions of new stars are born, ...
Our universe consists of billions of galaxies that each contain millions or billions of stars along with planets, moons, gas, dust and everything else found in space. Despite the vast amount of galaxies out there we break them all down into just three main categories: spiral, elliptical, and...
Globular clusters are usually composed of old stars. What do we know about the conditions in young galaxies that led globular clusters to form? Globular clusters do tend to be composed of old stars, but not entirely. Some of them (e.g., Omega Centauri) have a mix of stars of different ...
Webb is known for its ability to stare unblinking into the deep sky. Since it came online, it has produced deep-field images containing thousands of distinguishable galaxies and narrow profiles of individual stars—and its repertoire is still expanding. In June 2024, JWST astronomers presented the...
The first-ever composite image of a dark matter "bridge" that connects galaxies together. Credit: University of Waterloo Thus, dark matter's gravitational impact is extremely spread out and, it turns out, can only be observed when we look at the large-scale distribution of visible matter in...
Nonetheless all globulars are pretty darned alike, much as all elliptical galaxies are pretty darned alike. They don't have much in the way of structure, and what structure is visible through the eyepiece is as often as not a line-of-sight accident. ...
It has grown by consuming other galaxies. Yet, it too, may be destined to collide and merge with an even bigger galaxy: Andromeda. Though galaxy collisions are normal events and NASA suspects this collision is inevitable (in billions of years), new research argues that with our current knowle...
Already, this looks like a huge mistake: the new space telescope has produced embarrassing images of ancient galaxies that shouldn’t exist. We won’t dig into the Big Bang question here mostly because things are changing so fast almost anything I think to type will be obsolete before it ...
Surrounding the galaxy for thousand and thousand of light years is space.At great distances,however,billions of other galaxies are scattered.These galaxies are of many shapes and sizes.The Milky Way Galaxy is shaped like a spiral(螺旋型)disk.Other galaxies have been found to be shaped like ...
In the vacuum of space, sound waves cannot travel as they do on Earth. 9 Universe The universe is vast, possibly infinite, containing billions of galaxies, each with millions to billions of stars and planets. The observable universe is about 93 billion light-years in diameter, but the entire...