Hubble and Webb have come together to create one of the most detailed and revealing images of an iconic galaxy cluster!

When you measure the Universe's expansion rate to relatively nearby galaxies against the expansion rate in the cosmic microwave background radiation, the numbers don't agree, and their error bars don't overlap. This is the Hubble Tension. A new paper suggests the difference might be even greater by 2-3% (1.1 km/s/Mpc) when you account for the gravitational effect from the Laniakea supercluster, which dominates the gravity in our part of the Universe.

As far as we know, black holes can only be formed by the death of massive stars, but a persistent theory says that black holes of all masses could have formed directly in the early Universe. These primordial black holes would help explain several mysteries in astronomy: outlier mergers of black holes, dark matter, and young supermassive black holes. How are they different from stellar mass black holes, and what upcoming instruments could detect them?

An innovative camera pioneering a new technology in space caught a unique view of our home world.

The ESA Science Programme has narrowed down the possibilities for its next M-class mission to three concepts.