A massive galaxy that appeared less than two billion years after the Big Bang does not rotate on itself. This specimen, named XMM-VID1-2075, contradicts all astronomers' expectations. According to ...

Dark matter remains one of the most intriguing components of the cosmos, making up about 27% of the universe's total mass-energy content. It cannot be seen directly, yet its presence is inferred ...

Astronomers have found a massive galaxy at redshift 3.449, roughly 11.5 billion years in the past, that has essentially ...

The new results are based on the team's analysis of data taken by the Gaia and APOGEE instruments. Gaia is an orbiting space telescope that tracks the precise location, distance, and motion of more ...

Since the 1960s, it has been observed that the rotation speed of galaxies is greater than expected by the gravitational theory 1. A similar problem was observed in the 1930s for galaxy clusters 2. One ...