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 ...

Is there anything more that this data can tell us?'" Bajaj, an astronomer at the University of Arizona, told Space.com. Soon, ...

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 ...

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 ...

Gravitational lensing often evokes images of a cosmic funhouse mirror: duplicated galaxies, dramatic arcs and distorted ...

Andromeda XXXV is only about 20,000 times more massive than our Sun—very small, even for a satellite galaxy. For comparison, ...