It’s always amazing, and more than a little humbling, when the universe reminds us that our “common sense” is provincial, ...

In fact, these jets often expand into wide plumes or “lobes” that fan out far above and below their host galaxies. The jets ...

An expanding universe complicates this picture just a little bit, because the universe absolutely refuses to be ...

A new set of precision distance measurements made with an international collection of radio telescopes have greatly increased the likelihood that theorists need to revise the “standard model” that ...

For more than a century, physicists have suspected that the familiar three dimensions of space might be only a small slice of ...

There is an important and unresolved tension in cosmology regarding the rate at which the universe is expanding, and ...

Look up on a dark night and the stars seem scattered at random. Step back in scale, though, and the Universe looks nothing ...

Nearby, the stars and galaxies we see look very much like our own. But as we look farther away, we see the Universe as it was in the distant past: less structured, hotter, younger, and less evolved.

If you were to go as far out into space as you can imagine, what would you encounter? Would there be a limit to how far you could go, or could you travel a limitless distance? Would you eventually ...

A cosmic measurement technique independent of all others adds strong evidence pointing to a problem with the current theoretical model describing the composition and evolution of the Universe. A new ...