sun


A view from Proxima Centauri

What if you traveled to Proxima Centauri, the closest star to the Sun at the moment, and looked back in our direction? You would notice a slightly different constellation of Cassiopeia in the sky. The…


Proba-3 coronagraph: more minisatellites

ESA’s double-satellite Proba-3 mission will be flying where no previous member of the Proba minisatellite family has gone before – up to 60 000 km away, a seventh of the way to the Moon. Set…


Mercury transiting the Sun

Yesterday – for a lot of people still today – the tiny innermost planet Mercury crossed in front of the Sun. It was a good moment to actually see Mercury, because the planet is quite…


Mercury transiting Sun on Monday

Tomorrow, Monday May 9, the innermost più piccolo planetary family member, Mercury, will transit the Sun. Depending on where you are in the northern hemisphere, the time will be from early morning to early afternoon…


Big Sunspot

A big Sunspot showed up, large enough to eat a few Earths. The region is called AR 2529. The spot is large enough to be seen with the naked eye through a (proper) solar filter….


What the solar future holds

This is a final act of celestial beauty before the long fade into cosmic history. Invisibly buried in the centre of this colourful swirl of gas is a dying star, roughly the same mass as…