News tagged with galaxy formation

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Fireworks in the early universe

Galaxies in the early universe grew fast by rapidly making new stars. Such prodigious star formation episodes, characterized by the intense radiation of the newborn stars, were often accompanied by fireworks ...

Sep 28, 2012 5 / 5 (2) 1

Galaxies the way they were

( —Galaxies today come very roughly in two types: reddish, elliptically shaped collections of older stars, and bluer, spiral shaped objects dominated by young stars. The conventional wisdom is ...

Apr 03, 2013 4.5 / 5 (2) 0

Galaxies in the young cosmos

( -- The universe was born about 13.7 billion years ago in the big bang. The Sun and its system of planets formed about five billion years ago. What happened, then, during that long, intervening stretch ...

May 21, 2012 3.5 / 5 (2) 9 | with audio podcast

Modeling galaxy mergers

( —Astronomers think that many galaxies, including our own Milky Way, have undergone similar collisions during their lifetimes. Although galaxy collisions are important and common, what happens ...

Jun 03, 2013 3 / 5 (2) 1

A magnified supernova

Supernovae are among astronomers most important tools for exploring the history of the universe. Their frequency allows us to examine how active star formation was, how heavy elements have developed, and the ...

Sep 27, 2011 5 / 5 (1) 1