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 ...

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 ...

Rotation curve of the typical spiral galaxy M 33 (yellow and blue points with errorbars) and the predicted one from distribution of the visible matter (white line). The discrepancy between the two ...

The Nature Index 2026 Research Leaders reveal the leading institutions and countries/territories in the natural sciences, health sciences, applied sciences and social sciences, according to their ...

A black hole that weighs more than the rest of the galaxy hosting it. Discovered using the James Webb telescope in the ...