The great Russian physicist and Nobel laureate Lev Landau once remarked that "cosmologists are often in error, but never in doubt." In studying the history of the universe itself, there is always a ...

The Andromeda galaxy is surrounded by a constellation of dwarf galaxies that are arranged in a highly lopsided manner. Analysis of cosmological ...

We would need to find an entirely new cosmological model, one that works as well as our current one but that also explains this discrepancy. Needless to say, it would be a tall order. To many who ...

Mayall Telescope at Kitt Peak National Observatory in Arizona. The data, when combined with other cosmological measurements, hint at a possible weakening of dark energy’s influence over billions ...