Astronomy
- Astronomy
Ultrahigh energy cosmic rays come from outside the Milky Way
The biggest cosmic ray haul ever points toward other galaxies as the source of the rays, not our own.
- Astronomy
Readers ponder mini-spacecraft and Canaanites’ genomes
Readers have questions about miniature spacecraft project and Canaanite genealogy.
- Astronomy
R.I.P. Cassini
After 20 years, nearly 300 orbits and pioneering discoveries, the Cassini spacecraft plunges to its death in Saturn’s atmosphere — taking data until its very last breath.
- Astronomy
These are Cassini’s parting shots of the Saturn system
In its last hours before plunging into Saturn’s atmosphere, the Cassini spacecraft turned its cameras to some of the system’s well-known features.
- Astronomy
So long, Titan. Cassini snaps parting pics of Saturn’s largest moon
The last swing past Saturn’s largest moon sent Cassini heading directly towards the planet — and showed how future spacecraft will explore other moons.
- Astronomy
The sun’s strongest flare in 11 years might help explain a solar paradox
The sun tends to release its biggest flares at the ends of solar cycles — and we might finally be able to test why.
- Astronomy
Final flyby puts Cassini on a collision course with Saturn
A “last kiss goodbye” with Saturn’s largest moon sent the Cassini spacecraft on its final trajectory into the planet’s atmosphere.
- Astronomy
Pluto’s pits, ridges and famous plain get official names
From Adlivun to Voyager, the International Astronomical Union officially names 14 surface features on the dwarf planet.
- Planetary Science
Readers were curious about rogue planets, exomoons and more
Readers had questions about rogue planets, human arrival in Australia, and exomoons.
- Astronomy
Tabby’s star is probably just dusty, and still not an alien megastructure
New looks at older data on the weirdly flickering Tabby’s star muddy possible explanations — but it’s still probably not aliens.
- Astronomy
Star that exploded in 1437 tracked to its current position
Astronomers have hunted down a star seen exploding in the year 1437 and traced it since, offering clues to the stages of a white dwarf.
- Astronomy
Rumors swirl that LIGO snagged gravitational waves from a neutron star collision
Telescopes seem to be following up on a potential gravitational wave sighting.
