In the years following the launch of NASA's Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the ...

In the years following the launch of NASA’s Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby ...

The Andromeda Galaxy, 2.5 million light-years away, is unveiled in Hubble's largest photomosaic. Spanning a decade, this ...

NASA has released this photomosaic in two images that can be downloaded from its website: ...

Today, astronomers have measured the distance to the Andromeda Galaxy much more precisely; they find it to be about 2 1/2 million light years away. It is a majestic spiral-shaped galaxy ...

In the Milky Way and nearby galaxies, such as the Andromeda Galaxy, astronomers can observe stars one by one. But for ...

Photos from the James Webb Space Telescope have revealed more than 40 stars within the gravitationally lensed "Dragon Arc" ...

While the extra-galactic stars provided a microlensing effect, large clusters of dark matter provided a macrolensing effect.

Using the Cerro Tololo Inter-American Observatory (CTIO), an international team of astronomers have performed deep optical ...

Taking advantage of a cosmic "double lens," astronomers resolved more than 40 individual stars in a galaxy so far away its ...

The instrument, called the Prime Focus Spectrograph (PFS), features approximately 2,400 prisms scattered across the extremely wide field of view available at the Subaru Telescope’s primary focus, ...

Scientists have uncovered the existence of a binary star system close to the black hole near the center of the Milky Way galaxy.