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.

What is the biggest object in the universe? Learn more about the biggest objects in the universe, including galaxies, galaxy clusters, and dark matter.

NISAR, a giant orbiting antenna 39 feet in diameter, will monitor changes to glaciers, forests, and the Earth’s crust, providing data to help improve infrastructure and disaster responses.