Universe's Expansion Rate - Giant Elliptical Galaxy NGC 1453

Universe’s Expansion Rate Still Hard to Pin Down

The Universe’s expansion rate, the Hubble constant, is vital to understanding the Cosmos’ origin and fate. Discover how the latest technique for measuring the Hubble constant sheds new light on the past and future. (5:15 min read)

Arecibo Observatory Seen from Above Showing Damage

Arecibo Observatory Decommissioned After Second Cable Breaks

The Arecibo Observatory was already damaged when a main cable snapped. Find out why this closed the facility for good and what the plan is now. (4:00 min read)

Galaxy Formation: Artists' Conception of Wolfe Disk Galaxy

Galaxy Formation: New Wolfe Disk Upends Old Theories

Galaxy Formation in the early Universe was thought to be a chaotic series of collisions. Find out how a newly discovered disk galaxy calls that idea into question. (4:00 min read)