Biggest vs smallest - how do we measure up in the grand scheme of the universe? Explore the fascinating scales of existence, from quantum particles to the observable universe’s edge. A journey into ...

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But ...

The known universe is full of shockingly huge things. Here are the largest planets, stars, galaxies, and structures we've observed in the universe so far.

One of the worlds in the TRAPPIST-1 system, a mere 40 light-years away, just might be clad in a life-supporting atmosphere.

The rate of finding these distant worlds has recently increased, with astronomers scrambling to accommodate the data ...