Galaxies are vast gravitational structures that harbor billions to trillions of stars, as well as, interstellar gas, dust, and nebulae as well as the dark matter that binds them together. Our solar ...

Here’s how stars reveal a galaxy’s age—and what powers active cores like quasars and blazars.

ALMA observations of the spiral patterns in the disk around the young star IM Lup. The Atacama Large Millimeter/submillimeter Array (ALMA) has captured the motion of spirals of dust around a young ...