The Arecibo Message Fifty Years Later
In November 1974, astronomers used the radio telescope at Puerto Rico's Arecibo Observatory to send a hello to the universe.
NASA’s Europa Clipper
The spacecraft will investigate whether an icy moon of Jupiter can support alien life.
Snowball Earth
How scientists discovered that unique Scottish rocks record when Earth was first encased in ice.
Astronomers Have Warned against Colonial Practices in the Space Industry
A philosopher of science explains how the industry could explore other planets without exploiting them.
Meteorites from Mars
Meteorites that come from Mars help scientists understand the red planet’s interior.
The Seventeenth-Century Space Race (for the Soul)
The astronomical discoveries of the 1600s—such as Saturn’s rings—prompted new questions about the structure of the cosmos and humans’ place in it.
IceCube Detector Confirms Deep-Space “Ghost Particle” Phenomenon
IceCube scientists have detected high-energy tau neutrinos from deep space, suggesting that neutrino transformations occur not only in lab experiments but also over cosmic distances.
Surprising Discovery Challenges Key Principle of Modern Cosmology
Observations of an enormous cosmic structure, dubbed the "Big Ring," seem to violate the Copernican principle.
100 Years after the “Great Debate”: How Edwin Hubble Expanded the Cosmos
In 1924, Edwin Hubble found proof that the Milky Way isn't the only galaxy in the Universe.