This colored version of a 19th-century engraving depicts ancient Greek astronomer Hipparchus using a sighting tool to measure the positions of the stars. Science historians don't know exactly how ...

Elemental: Crafting Books from Nature” is an ode to the physical book, exploring thousands of years of practical knowledge ...

Across history, ancient civilizations crafted prototypes for many of the modern mechanisms that have become integral to ...

Astronomers discovered a new class of cosmic explosions known as "extreme nuclear transients" that are the most powerful phenomena known, aside from the Big Bang.

For years, astronomers have predicted a dramatic fate for our galaxy: a head-on collision with Andromeda, our nearest large galactic neighbor. This merger—expected in about 5 billion years—has ...

Using the Low Frequency Array (LOFAR), European astronomers have investigated a galaxy cluster designated CIZA J2242.8+5301, dubbed the Sausage cluster. The observations conducted at very low ...

Astronomers have finally tracked down missing "ordinary" matter, which they discovered hiding as gas spread out in the vast expanses between galaxies.

Stargazing in July hopefully promises warm nights in Wyoming. The highlight of July evenings is the prominent band of the ...

Astronomers have long estimated that ordinary matter – basically, anything other than dark matter – makes up only a fraction of the known universe.

Astronomers in Hawaii have discovered a new kind of explosion, and they’re the most energetic stellar explosions ever recorded. Meet “extreme nuclear transients” (ENTs): when supermassive ...

Astronomers have finally tracked down missing "ordinary" matter, which they discovered hiding as gas spread out in the vast expanses between galaxies.