Robert Lea

Cosmologists have a problem: Their measurements of the rate of expansion of the universe don't agree. And a new, highly accurate measurement of variable stars could deepen this 'Hubble trouble.'

A hybrid eclipse, which shifts between total and annular, is exceedingly rare, occurring only a few times per century.

The James Webb Space Telescope has investigated the wreckage of a titanic cosmic explosion, capturing a stunning image of the supernova remnant known as Cassiopeia A.

SpaceX has shared some amazing photos of its giant Starship vehicle stacked for launch at the company's Starbase facility in South Texas.

A red dwarf star almost 500 light-years from Earth is surrounded by two rings of dust that might have been separated by the orbit of a Saturn-sized planet.

The Hubble Space Telescope has spotted a runaway supermassive black hole racing through space followed by a tail of infant stars 200,000 light-years long.

The James Webb Space Telescope has captured an amazing image of the ice giant Uranus showing its ring system, bright moons and changing atmosphere.

A NASA astronaut and two cosmonauts took a Soyuz capsule for a spin at the International Space Station early Thursday (April 6) to make way for a new cargo ship.

After April 2023's Pink Moon had set, photographers from across the globe took to social media to share their images and videos of the full moon.

To illustrate the importance of planetary defense NASA scientists have devised an exercise that shows the potential devastation that could be caused by a hypothetical asteroid strike.

Astronomers have discovered precursors for life and other complex molecules in a region of star and planet formation close to the solar system, the Perseus Molecular Cloud.

Two battling quasars powered by supermassive black holes are lighting the center of merging galaxies seen during "cosmic noon" in the early universe.

April's full moon rises tonight (April 5), and peaks in the early hours of Thursday morning. Yet despite its name, April's Pink Moon never actually takes on a rosy hue.

The 'Hawking radiation' emitted by black holes may be able to carry information after all, a new solution to Stephen Hawking's famous paradox suggests.

The launch of the Tianlong-2 rocket made history as the first liquid propellant rocket launched by a Chinese private company, which is the first start-up to successfully reach orbit on its first try.

Astronomers have discovered two new black holes that are the closest to Earth ever found and represent a new type of binary system.

The James Webb Space Telescope's ability to study the early universe has been solidified by the confirmation that it has imaged four galaxies as they were just 350 million years after the Big Bang.

Using samples returned from the 0.6-mile-wide asteroid Ryugu, scientists have calculated what would happen if it were to slam into our planet.

Scientists have discovered a connection between supermassive black holes and densely packed gluon 'walls' called color glass condensates.

NASA's DART mission, an attempt to discover if a spacecraft impact can shift an asteroid away from a collision course with Earth, has been described as a "smashing success."

A bizarre object called "the Cow" is the flattest explosion ever detected, and the first example of a rare phenomenon called a fast blue optical transient (FBOT).

A collision of two galaxies appears like a vast cosmic butterfly, or a giant piece of candy, to the eyes of one of the world's most powerful telescopes.

A new map of Mars shows the Red Planet in stunning detail, revealing a wealth of fascinating geological features as seen from orbit.

Icy 'rain' from Saturn's rings is heating the gas giant's atmosphere, a phenomenon never seen in the solar system before, a new study suggests.