Category Archives: Astrophysics

Time scales for astrophysical phenomena are sometimes thought to be overwhelmingly large and to exceed by far human life. While this is true for many cases, there are others which take the blink of an eye. Halfway between them, some […]

Much attention has been payed lately to the novice comet C/2012 S1, more widely known as comet ISON. At the crest of the wave, it was even said that the integrated brightness of the comet after the perihelion could exceed […]

A lot of ink has been wasted in the last decades discussing whether string theory is a good description of nature or merely a mathematica construct with no connection at all with reality. However, the answer to this question actually […]

Todays story seems fairly simple: a magnetar has been seen spinning down. Impressive, isn’t it? You might be wondering what the hell is magnetar and why we should care about its spin. As it happens many times in science, we […]

We needed a Big Bang to create lithium, now it seems that it is much easier to destroy. This light element is the center piece of one of the most intriguing astronomical controversies. Can we use the lithium to look […]

Go to a dark place and look to the night sky. How many stars you can count? This is an ancient question which can be traced back at least to the classic Greek philosophers. However, no matter how dark your […]

TW Hydrae is a peculiar star. Although it is not bright enough to be visible to the unaided eye, it is relatively close to us, just 180 light-years away, and this makes it the closest T Tauri star in the […]

During the last year, a longtime forgotten controversy was reactivated by a very interesting paper written by J. Polchinski and his collaborators, in which they questioned whether the so called black hole complementarity principle is a good solution to […]

NGC1365 is a beatiful galaxy. It is big and bright enough to be observed with a medium-sized amateur telescope. Sometimes mis-located at the southern constellation of Eridanus, it is indeed located in the smaller Fornax constellation and it is one […]

Newton’s theory of gravitation assumes that the speed of gravity is infinite and the gravitational interaction is instantaneous. However, Einstein’s theory postulates that it is exactly equal to the speed of light. A team of Chinese physicists lead by Tang […]