Paul Sutter, Author at Astronomy.com | Page 2 of 4

An artist’s portrayal of a warm Jupiter gas-giant planet (right) in orbit around its parent star, along with smaller companion planets. Credit: Detlev Van Ravenswaay/Science Photo Library

Exoplanets, Observing

Amateur astronomers help ID a ‘warm Jupiter’ exoplanet

PRIMA will measure the absolute and relative abundances of heavy elements where they are formed, deep in the hearts of galaxies. Credit: NASA/Jenny Mottar

Exotic Objects, Robotic Spaceflight

Which came first, galaxies or black holes? This is the plan to find out

The Sun rises slowly spreading a golden glow over Earth in this image taken from the International Space Station. Credit: NASA.

Why good science is needed more than ever, and so is good faith

A map of the celestial hemisphere compiled from data from the eROSITA telescope — the colors reflect the wavelengths of X-rays. Hot gas haloes surrounding galaxy clusters have broad-band emissions (white), as do black holes (white dots); diffuse emissions have long wavelengths (red); and in the central regions of the Milky Way, dust blocks longer-wavelength emissions, so that only short-wavelength X-rays are visible (blue or black).

Cosmology, Science

Dazzling sky survey maps 5,259 galaxy clusters and sheds light on dark matter

A side-by-image of the "shadows" carved out of background light by a black hole.

Exotic Objects, Science

The 2nd photo of the M87 black hole is stunning, and more than a pretty picture

This map shows the night sky at different times in December, January, and February. Credit: Astronomy: Roen Kelly

A scientific guide to zodiac signs, history, and flaws

Time travel is one of the most intriguing topics in science.

What is the speed of light? Here’s the history, discovery of the cosmic speed limit

This 2008 image from the Hubble Space Telescope indicates that a huge ring of dark matter likely exists surrounding the center of CL0024+17 that has no normal matter counterpart. Credit: NASA.

Cosmology, Science

Dark matter might keep itself company, and that helps solve 2 cosmic puzzles

The Milky Way (green) lies in an area with little matter. The galaxies in the bubble move in the direction of the higher matter densities (red arrows). The universe therefore appears to be expanding faster inside the bubble. Credit: AG Kroupa/University of Bonn

Cosmology, Science

Cosmologists toy with novel ideas to resolve Hubble tension

Cosmology, Science

Will we ever figure out how to defy gravity?

The Earn and Moon, seen from the International Space Station. Credit: NASA Earth Observatory

Earth and the Moon are proportional partners, and that might be rare

A telescope scans the sky in search of signals sent from advanced alien civilizations in this artist's concept. Credit: paulista/Shutterstock.

Alien Life, Science

Are we visible to alien astronomers? This study makes the case