Category Archives: Astrophysics

A group of astrophysicists (to which I have the pleasure to belong to), led by scientists from the Instituto de Astrofísica de Canarias (IAC, Spain), have recently published an article in Nature Astronomy in which the early events shaping the […]

Black holes are vacuum solutions of the Einstein equation. Hence, the energy-momentum tensor for a black hole is null at every point of space. The only place where its mass can be located is where there is no space, i.e., […]

I remember very well my physics professor during my first year at university. She stressed the importance of having clear intuitions of what physical terms mean before any mathematics was invoked. ‘Imagine someone drops an 100-gram apple 1 metre above […]

Astrophysicists from Yale University have recently claimed the discovery of a galaxy lacking dark matter . But, to fully understand (and assess) the excitement produced by this paper, let’s review a couple of things regarding dark matter and galaxies. In […]

Author: Tomás Ruiz-Lara is a researcher at the Instituto de Astrofísica de Canarias
It is commonly said that Astronomy is an observational science. We cannot create and study stars or galaxies in our laboratories and, thus all the information we […]

After all those big discoveries of the latest years (LIGO’s gravitational waves, or NASA’s TRAPPIST system, for example) I felt the need to explain how normal everyday astrophysics is dealt with. To explain the little things behind any discovery, and […]

The direct search for dark matter has been a thriving experimental field since a couple of decades, and a new and promising experimental approach has been recently developed and tested: the use of an atomic clock inner mechanics. This whole […]

We live in a violent universe. The energy scales involved in many astrophysical processes are enough to stamp out our planet, not to talk about life as we know it. But, somehow, we have been living so far in a […]

Our universe is not stable according to the currently measured values of the top quark and Higgs particle masses. There is a non-null probability that at any instant in the next billions of years the present “false vacuum” will change […]

Superconductors are a particularly strange kind of metal. What makes them different is their behavior at very low temperatures – extremely low, that is, close to absolute zero. Basic thermodynamics dictates that in this regime we should expect all motion […]