BL Lacertae blazar shifts between classifications faster than expected. It shows record X-ray activity and challenges current ...

Cherry Springs, isolated atop its mountain and surrounded by the 265,000-acre Susquehannock State Forest, remained a haven of darkness. In 2000, the park was designated as Pennsylvania’s first Dark ...

Nestled in the remote highlands of Potter County, Cherry Springs State Park offers something increasingly rare in our modern world – a chance to see the night sky as our ancestors did, ablaze with ...

At the Harvard College Observatory in years around 1900, women were hired to make measurements of astronomical data and do ...

Astronomers from the University of Arizona have uncovered astonishing details about a galaxy that existed when the universe ...

BEIJING -- Chinese and foreign astronomers have unveiled the first three-dimensional map of the properties of interstellar ...

The vernal equinox occurs as Mercury stands still in Pisces and several of Jupiter’s moons transit in the sky this week.

Voluminous clouds of cosmic dust permeate our galaxy, but only recently has software allowed detailed observations of the ...

When we observe distant celestial objects, there is a possible catch: Is that star I am observing really as reddish as it ...

The discovery of the dwarf galaxy Andromeda XXXV --located roughly 3 million light-years away and the smallest yet found in the Andromeda system -- is forcing astronomers to rethink how galaxies ...

A major discovery on the outskirts of Andromeda is shaking up our understanding of galactic evolution. Astronomers have found the dimmest and smallest satellite galaxy yet—Andromeda XXXV—forcing them ...

Astronomers from the Max Planck Institute for Astronomy have constructed the first detailed 3D map of the properties of cosmic dust in our home galaxy. For their map, the astronomers used 130 million ...