A team from the Instituto de Astrofísica de Canarias (IAC) has quantified for the first time the impact that the motions of binary stars can have on estimates of dark matter in some of the smallest galaxies in the universe. The study proposes a new methodology that will make it possible to obtain more precise measurements of the amount of dark matter present in these systems. The Milky Way, our galaxy, contains hundreds of billions of stars. However, dozens of much smaller galaxies orbit around it, dwarf companions that host thousands of times fewer stars and live embedded within our galaxy

The upcoming eclipse on August 12, which will be visible across a large part of our country, is a unique opportunity to witness one of the greatest astronomical spectacles visible to the naked eye. But it can also cause serious problems if proper precautions aren’t taken. Here’s what we need to keep in mind: The danger of looking at the Sun Looking directly at the Sun—whether during an eclipse or under normal conditions—can cause serious and irreversible damage to your eyesight, including blindness. The retina can be burned without causing any pain, so the damage may go unnoticed at the time