Astronomy

This is a map of the universe.

What does it mean for

Why are there three arches across the sky instead of two?

The best way to see comet R3 PanSTARRS’s long tail is with a camera.

Have you ever had

Near the eastern horizon before sunrise, Comet C/2025 R3

Sunlit arms of a

Measuring the strength of gravity is extraordinarily difficult, and different experiments have always disagreed – but a new test is paving the way to finally understanding nature’s most enigmatic force

Much of visual astronomy requires nothing more than clear skies, keen eyes, and patience. If you’re out skywatching Saturday evening and live in North or South America, watch for the waxing gibbous Moon pairing with Regulus at dusk. For a privileged region, the Moon will actually blot out or occult the star, in one of the best-placed lunar occultations of a bright star for 2026.

New observations from the James Webb Space Telescope might have caught the signature of the universe's first stars.

The post Catching the Earliest Stars in the Universe appeared first on Sky & Telescope.

People with cognitive decline or early-stage dementia saw their symptoms improve when given bespoke treatment plans that targeted their personal nutritional deficiencies, ongoing infections and environmental exposures

Subatomic black holes from ancient cosmic history could, in principle, make you have a very bad day. But chances are you’ll never encounter one

President Trump keeps promising to secure Iran’s nuclear “dust,” which is actually a gas

Physicists have long suspected that there is a layer of physical reality beneath quantum theory and a new mathematical model unveils just how strange it might be

Physicists have long suspected that there is a layer of physical reality beneath quantum theory and a new mathematical model unveils just how strange it might be

New research shows the global wildlife trade is rapidly accelerating the spread of animal pathogens that can jump to humans

New research reveals that a rift in Earth’s crust is just a few million years away from splitting the continent of Africa into two—and creating a new ocean

As sea ice continues to succumb to the climate crisis, measuring its decline with precision has never been more urgent. To meet this challenge, the European Space Agency is developing three new Copernicus satellites, each employing distinct but complementary techniques to monitor this fragile component of the Earth system.

To ensure the data from these new satellites are razor-sharp, an international team of hardy scientists is now out on the Arctic sea ice braving the cold and flying above to collect critical in situ measurements.

A clinical trial to reverse age-related vision conditions using stem cell treatment could finally deliver on the promise of a major discovery in ageing and regeneration made 20 years ago, says columnist Graham Lawton

A clinical trial to reverse age-related vision conditions using stem cell treatment could finally deliver on the promise of a major discovery in ageing and regeneration made 20 years ago, says columnist Graham Lawton