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Chemistry

How to turn most of the CO2 an astronaut exhales into fresh oxygen

A chemical reaction that recycles carbon dioxide into fresh oxygen could provide more sustainable life support for astronauts on the moon or Mars – and as a bonus, it also produces carbon nanotubes

News

Space

Polaris Dawn mission is one giant leap for private space exploration

Analysis

Mathematics

The mathematical theory that made the internet possible

News

2XGTH8A In this image from video provided by NASA, astronauts Suni Williams, left, and Butch Wilmore give a news conference aboard the International Space Station on Wednesday, July 10, 2024. (NASA via AP)

Space

The Starliner stranding shows why NASA was wise to have a backup plan

Leader

Space

SpaceX's Polaris Dawn crew set to attempt the riskiest spacewalk yet

News

Space

Stranded ISS astronauts reveal the US space programme is not in crisis

Analysis

Space

JWST found rogue worlds that blur the line between stars and planets

News

Chandra X-ray Observatory

Space

Why we need to save the Chandra space telescope

Comment

Illustration of NASA's Europa Clipper passing Europa

Video

Sam Howell: ‘One day we might look for life directly on Europa’

Video

Space

Lightning can make energy waves that travel shockingly far into space

Lightning strikes near Earth give rise to electromagnetic waves called “whistlers” that can carry energy high enough above our planet to pose a risk to satellites and astronauts

News

Physics

How Einstein was both right and wrong about gravitational waves

News

Space

Two NASA astronauts may be stuck on the space station until February

News

Space

Critics of the International Space Station are missing the point

Leader

Space

Five of the most important International Space Station experiments

Features