The fact that black holes must exist results from Albert Einstein’s general theory of relativity. This describes gravity as the curvature of space and time. Black holes are an extreme example of the curving of space-time. An extreme amount of mass is concentrated within such a small region of space that not even light...
The universe is expanding. How fast it does so is described by the so-called Hubble-Lemaitre constant. But there is a dispute about how big this constant actually is: Different measurement methods provide contradictory values....
First of two parts. Read part two.
In mystery stories, the chief suspect almost always gets exonerated before the end of the book. Typically because a key piece of evidence turned out to be...
There’s a new cosmological background in town. In June, researchers from the North American Nanohertz Observatory for Gravitational Waves, or NANOGrav, published the results...
Satellites are more likely to be at risk from high-speed solar wind than a major geomagnetic storm according to a new UK-US study published this week in the Journal Space Weather.
Researchers investigating the space...
We all know most popular planetary models proposed by Kepler, Ptolemy and Copernicus. Indian astronomers also proposed different planetary models. Earliest Indian planetary model...
The Japanese space agency said it has lost contact with its intrepid Venus spacecraft Akatsuki.Akatsuki is Japan's mission dedicated to studying the climate of...
Christopher Ali, Penn State
Millions of Americans still don’t have access to high-speed internet. Christopher Ali, a professor of telecommunications at Penn State University, discusses...
Could quasi-moons or minimoons hit Earth?Scientists used to think certain quasi-moons had a significant chance of impacting Earth, but thankfully, that’s no longer the...