The discovery of a stably rotating disk galaxy in the early universe is the best indicator yet for how galaxies like the Milky Way formed.
A 2008 image captured a stunning double loop of stars around an edge-on galaxy. Now, astronomers are questioning whether one of those loops exist.
Astronomers have discovered a galaxy that formed five times as many stars as the Milky Way within 2 billion years after the Big Bang — but then quickly quelled any further starbirth.
The LOFAR survey, based in The Netherlands, has released a bonanza of new sources. And with only 2% of the sky covered so far, this is only the beginning.
The SPHEREX mission will create multiple surveys of the near-infrared sky that will reveal the origins of life and perhaps the universe itself.
By tracing stars in other galaxies, the Gaia satellite has helped astronomers understand the relative motions of the Milky Way's galactic siblings.