1–20 of 499 results
Starlink globe

Astronomy and Society

Streetlights to Satellites: Addressing Light Pollution with the United Nations

The United Nations' Office of Outer Space Affairs is considering issues of light pollution spanning from streetlights to satellites.

Apollo 11 photo of Earth with glare from Sun

Science and Space Policy

Did Astronomers See a Distant, Dying Star? Or an Earth-bound Satellite?

What seemed a lucky break — the discovery of a gamma-ray burst in the most distant known galaxy — might instead be the flash of passing space debris. As satellites fill low-Earth orbit, such events might become common.

Most distant quasar

Science-based Q&A

What Is a Quasar?

A quasar is a supermassive black hole gorging on gas in the heart of a distant galaxy.

Molten Ring

Galaxies

60-second Astro News: Magnified Galaxies Provide Window to Early Universe

Astronomers use cosmic magnifying lenses to peer into the universe's distant past.

Superbubble in the Milky Way

Stellar Science

Supernova Blasts Hollowed Out "Giant Cavity" in Space

Some 10 million years ago, dying stars cleared a giant cavity in space and ultimately inspired a new generation of star formation.

Gravitationally lensed supernova, four ways

Stellar Science

60-second Astro News: Solving Supernova Mysteries

This week, astronomers have solved one supernova mystery and predicted a new one — to be solved in 2037.

Clouds in the Milky Way halo (art)

Milky Way

Take a Deep Look into the Milky Way Halo

New analysis shows the best view of the Milky Way halo to date, providing a window into our galaxy's future star formation.

M13

Black Holes

60-second Astro News: White Dwarfs Still Burn, Black Holes Merge

This week in astronomy news, we learn that some white dwarfs still burn and image X-rays from black holes almost 12 billion light-years away.

Star with planet

Stellar Science

Astro News: Planet-eating Stars and an Accidental Brown Dwarf

This week in astronomy news: A citizen scientist happens upon a weird, ancient brown dwarf and astronomers discover that Sun-like stars eat their own planets.

Zoomed-in view of barred spiral galaxy NGC 4921

Galaxies

Watch Black Holes Grow, Galaxies Fall

Watch black holes grow and galaxies fall — astro photos and visualizations to get you through the week.

Decadal survey: Origins, LUVOIR, HabEx, Lynx

Astronomy & Observing News

Astronomers Dream Big, Consider Four Future Space Telescopes

Four concepts are competing to be NASA’s next flagship mission. From exo-Earths to X-rays, what will the future hold?

New model of Saturn's interior

Solar System

Saturn Has a Fuzzy Core, Too

New research reveals that Saturn, like Jupiter, has a “fuzzy” core that extends 60% of the way to its surface, a finding that is changing how astronomers think about giant planets.

Black hole accretion disk

Black Holes

How Black Holes Eat Reveals Their Mass

No one knows why quasars flicker — but astronomers are using these wavering beacons to "weigh" the black holes that power them.

Mars interior

Solar System

NASA's Insight Reveals First Look Inside Mars

The Insight mission science team has used about 10 deep marsquakes to take stock of the planet's anatomy.

Orphan cloud seen in X-rays and visible light

Galaxies

Lost & Found: Milky Way-size "Orphan Cloud"

Astronomers have found a giant gas cloud, likely stripped from its parent galaxy long ago, in a cluster 330 million light-years away.

Smallest white dwarf comparison to Moon

Stellar Science

Moon-size White Dwarf Is the Smallest Ever Found

Astronomers have discovered a white dwarf only slightly bigger than the Moon, making it the smallest ever found. It might even be on the edge of collapse.

Galaxies

Galaxies That Evolve Together But Don’t Stay Together

A study of 36 dwarf galaxies within a volume of space spanning 13 million light-years show they all have remarkably similar histories despite the vast distances between them.

Epsilon Aurigae model

Stellar Science

The Giant Star That "Blinked"

Astronomers are trying to understand why a giant star "blinked," fading almost completely before brightening again over the course of about 200 days.

CHIME

Stellar Science

Number of Known Mysterious Radio Flashes Nearly Quadruples

The CHIME telescope has released its first catalog with 492 unique sources of fast radio bursts, the brief flashes of radio waves that have been intriguing astronomers over the past decade.

Galactic center

Black Holes

Astronomy in Pictures: Unraveling Galaxies and Clyde's Spot

This week in astronomy pictures: Peer into our galaxy's busy core, watch Clyde's Spot unravel at Jupiter, and see a stunning Hubble photo of a lopsided galaxy.

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