Tag Archives: universe

Pale Blue Dot, 32 years later

Pale Blue Dot Revisited (2020) – Image credits NASA/JPL-Caltech I am in this picture. If you are at least 32 years old, you are in this picture as well. That tiny pale blue dot is planet Earth: it’s us. “The Earth is a very small stage in a vast cosmic arena. Think of the riversContinue reading “Pale Blue Dot, 32 years later”

Cosmic Home

🇧🇷 🇪🇸 🇮🇹 This is home. As seen from Mars, after sunset. There is a little rover with a camera on Mars — humans sent it, and it took this photograph of all of us, 160 millions kilometers away. We all are the “evening star” in someone else’s sky. We all are just a tiny tinyContinue reading “Cosmic Home”

Cosmic eyes

🇪🇸 🇧🇷 🇮🇹 “Little” Cosmic Eyes: the difference a century of human advance can make. The barred spiral galaxy NGC 1398 as seen from Earth: today (ESO telescopes, photo on the left) and about 100 years ago (Telescope of the Palomar Observatory, photo on the right). The photons arriving on Earth are the same; weContinue reading “Cosmic eyes”

The density of black holes

Black holes are the most extremely compact objects of the Universe. In fact, at their center lies a singularity: a point with zero volume, where all the mass of the black hole is compressed. The singularity is a region of infinite density — something that is not really conceivable by the human mind. Density isContinue reading “The density of black holes”

Welcome! Bienvenid@s! Bem-vind@s! Benvenuti!

[Aquí en español — Qui in italiano — Aqui en português] Welcome to “blackholewinds.space“! This page was born from the need to share the riches that my occupation gives me (I will tell about the torments only if they contain a remarkable and immediate didactic side). I am a lucky human, spending my life inContinue reading “Welcome! Bienvenid@s! Bem-vind@s! Benvenuti!”