Astronomy
A newly found world blurs the boundary between planet and moon
The object orbits a brown dwarf that orbits a star, and astronomers aren’t sure if it’s a planet, a moon — or something else entirely.
Space
We summarize the week's scientific breakthroughs every Thursday.
More Stories in Space
- Artificial Intelligence
AI is not ready to fly solo in space
In sci-fi, AI can navigate the unknowns and — ideally — keep human travelers safe. But it’s not intelligent enough to do that yet.
- Astronomy
A quasar breaks the record for most distant supermassive black hole
The Euclid space telescope discovery could help researchers understand how black holes grew so massive so quickly in the early universe.
- Planetary Science
Meet the Milky Way’s puffiest planets
Two “superpuff” planets orbiting a sunlike star over 1,000 light-years from Earth are as big as Jupiter and as dense as cotton candy.
- Space
Pluto has landslides
New Horizons data reveal Pluto’s first six confirmed landslides along steep crater rims.
- Space
A shoebox-sized satellite could expose hidden nuclear weapons in space
There’s never been a good method to check for violations of the Outer Space Treaty’s prohibition of nuclear weapons in space.
- Space
This space telescope is falling. A robotic spacecraft may save it
A private rocket mission aims to boost NASA’s Swift telescope before its orbit decays, extending its hunt for gamma-ray bursts.
- Planetary Science
A Mars rover found organic carbon just sitting on a rock
The organic molecules could come from life or from ordinary chemistry — only samples returned to Earth can settle it.
- Space
Is NASA falling out of love with Mars?
Editor in chief Nancy Shute discusses NASA's rocky relationship with Mars exploration.
- Planetary Science
NASA seems to be backing away from hunting for life on Mars
Viking 1 kicked off the search for Martian life 50 years ago. Now NASA’s shifting priorities are putting the quest in limbo.
