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Physics

Ultracold atoms could test relativity in the quantum realm

Confining and rotating extremely cold atoms or molecules within atomic “Ferris wheels” made from laser light could test relativity’s predictions on the quantum scale

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Satellite-filled sky

Earth

How worried should we be about noxious chemicals from dead satellites?

Features

Once Upon a Time in Space book - James Bluemel Cosmonaut Valeriy Polyakov seen in Mir?s window from Shuttle Discovery STS063-711-080 (6 Feb. 1995) --- Cosmonaut Valeriy V. Polyakov, who boarded Russia's Mir Space Station on January 8, 1994, looks out Mir's window during rendezvous operations with the Space Shuttle Discovery. This is one of 16 still photographs released by the NASA Johnson Space Center (JSC) Public Affairs Office (PAO) on February 14, 1995. Onboard the Discovery were astronauts James D. Wetherbee, mission commander; Eileen M. Collins, pilot; Bernard A. Harris, Jr., payload commander; mission specialists C. Michael Foale, Janice E. Voss, and cosmonaut Vladimir G. Titov. Page 134

Space

See the beauty of space, captured by the astronauts who experienced it

Regulars

Space

Is the universe really one big black hole?

Comment

Do black holes exist and, if not, what have we really been looking at?

Space

Do black holes exist and, if not, what have we really been looking at?

Features

Physics

Ultracold clocks could reveal how quantum physics alters time

News

A bright star emitting streaks of light that curve outwards as the star moves across the night sky

Space

How faster-than-light explosions could reveal the universe’s secrets

Features

Geometric 3d render shower of decorative starry short lines. Digital waterfall made futuristic straight shapes with random repetition. Tears outer space falling in rays bright stars.; Shutterstock ID 1952851798; purchase_order: -; job: -; client: -; other: -

Physics

Should it be space-time or spacetime – and why does it matter anyway?

Comment

NASA Astronaut John Glenn inside a vacuum chamber

Video

Inside the missions that made the moon landings possible

Video

John Glenn during the fiery re-entry, holding steadfast, believing his heatshield had come loose and he may burn up in the atmosphere - the capsule is illuminated in orange light due to intense heat.

Space

NASA's first space photos restored in stunning detail

The new book "Gemini and Mercury Remastered" features iconic images from the earliest days of human space exploration

Regulars

Space

Could a huge lunar telescope be our best chance of spotting aliens?

Comment

Space

Why auroras are so much brighter and more easily visible recently

Features

Space

CPR in space could be made easier by chest compression machines

News

Space

New moon discovered orbiting Uranus is its smallest one

News