A difference of a few kilometers per second might not sound like much. In cosmology, it has become one of the field’s most ...

A major international effort has produced an ultra-precise measurement of the Universe’s expansion rate, confirming it’s ...

Trying to measure the size of the universe is no easy task. We know that the universe is expanding, though the exact rate of this expansion is not yet fixed. So one method that astronomers use to tell ...

An international collaboration of astronomers has produced one of the most precise measurements yet of how fast the local ...

Artist’s interpretation of the cosmic distance ladder — a succession of overlapping methods used to measure distances across the Universe, where each rung of the ladder provides information that can ...

The first method involves direct distance measurements from nearby stars and galaxies. In contrast, the second looks further ...

The cosmic distance ladder could soon have another rung. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Breaking space news, the latest updates ...

The cosmic distance ladder is the world’s longest ruler, built to measure the universe. Since the time of the ancient Greeks, scientists have been constructing a cosmic measuring tape to measure the ...

It’s a bit mind-bending to realise that everything we know about the scale of the universe comes from people stuck on a tiny rock, peering through glass at dots of light. We can’t exactly pull out a ...