This section of Mètode is now twenty years old. To celebrate it, I retrieve a topic I talked about in issue 34: planetary nebulae.

The first object in the Kuiper belt visited by New Horizons after leaving Pluto was provisionally named Ultima Thule and has recently been renamed Arrokoth.

At the Lund Observatory in Sweden there is a painting of the first realistic representation of our galaxy, the Milky Way. The idea of carrying out this scientific and artistic work came from the Swedish astronomer Knut Lundmark who, at the beginning of the 1950s, set out to represent the Milky Way as a whole.

En el marc de la teoria general de la relativitat, Einstein va postular l’existència de les ones gravitacionals, encara que pensava que mai es podrien detectar.

Recently, a star with a very unromantic name, KIC 8462852, became a trend in some social networks. It is a very common star, located in our galactic neighborhood, some 1,500

It is clear that there are not only five dwarf planets, but probably many more, possibly thousands.

On 4 September, the cover of Nature showed a dark background with a strange figure made of light filaments, one that could remind us of neurons, over which we could

The last song in Pink Floyd’s LP The Dark Side of the Moon, published in 1973, mentioned it: «There’s no dark side of the Moon really. Matter of fact, it’s all dark. »

Cortesia de Harvard College Observatory Harvard's «computers» in 1891. Williamina Fleming is standing in the centre of the image and Edward Pickering is on the left. Nowadays

© Photo: Javier Díez (www.jdiez.com). Montage of the constellations: Fernando Ballesteros. The night sky from the Observatory of the University of Valencia in Aras de los Olmos. In the photograph we

Since Swiss astronomers Michel Mayor and Didier Queloz announced the discovery of the first extrasolar planet or exoplanet, in 1995, different research groups worldwide took up the hunt for planets

In ancient Greece, Empedocles stated that everything was made up of only four elements: water, fire, earth and air. It was undoubtedly the first attempt to describe the content of our universe. Over a hundred years later, Aristotle added a fifth element: ether or quintessence, which formed the stars, while the other four were the constituents of terrestrial substances.

© V. Peris i J. L. Lamadrid Picture of the Andromeda galaxy. Picture taken by the astrophotographer from the Astronomical Observatory of the University of Valencia, Vicent Peris and his