The Latest Breaking News from Edwin Hubble

In 1917, Einstein called it his 'greatest blunder', but the idea he discarded returned decades later to become central to modern cosmology

Einstein’s cosmological constant was initially introduced to create a static universe but was later abandoned. Astronomers subsequently discovered that the universe was expanding, contradicting Einstein’s original static model. Decades later, observations revealed that this expansion was actually accelerating. The acceleration is now attributed to dark energy, with the cosmological constant…

The Economic Times · Aug 19

Space science has come a long way since July 4, 1776. Here's a look back at the saga

Celebrating America's 250th birthday, Space.com looks back at what our understanding of space was like in 1776 and what major developments occurred to change our thinking.

Space · Jul 3

America 250: How has telescope technology evolved since the dawn of the U.S.?

Optical telescopes have come a long way in the past two-and-a-half centuries — from the homemade telescope of William Herschel to the orbiting Hubble Space Telescope.

Space · Jun 30

Every major galaxy is speeding away from the Milky Way, except one — and we finally know why

A vast, flat sheet of dark matter may solve the long-standing mystery of why our neighboring galaxy Andromeda is speeding toward us while our other neighbors are moving away from us.

LiveScience · Feb 6

The universe may be lopsided, new research says

The shape of the universe is not something we often think about.

Space · Jan 5

Our favorite Space.com stories of 2025

We asked our staff to choose their favorite Space.com stories of 2025. Here's what we got.

Space · Dec 28, 2025

The universe may be lopsided – new research

The shape of the universe is not something we often think about. But my colleagues and I have published a new study suggests it could be asymmetric or lopsided, meaning not the same in every direction.

The Conversation · Dec 22, 2025

Science history: Edwin Hubble uncovers the vastness of the universe with discovery of 'standard candle' — Oct. 5, 1923

On the night of Oct. 5, 1923, Edwin Hubble observed a strange star that flickered in intensity at regular intervals. The star, dubbed M31-V1, was key to showing that the universe extended far beyond the borders of the Milky Way.

LiveScience · Oct 5, 2025

Fixing the Hubble Space Telescope: A timeline of NASA's shuttle servicing missions

Spacewalking astronauts repaired and upgraded the famed Hubble Telescope during five missions from 1993 to 2009. Here's a summary of these epic servicing efforts.

Space · Apr 22, 2025

Universe may revolve once every 500 billion years — and that could solve a problem that threatened to break cosmology

A slowly spinning universe could resolve a puzzle in physics known as the Hubble tension, a new model suggests.

LiveScience · Apr 19, 2025