Planets Form 100x Faster Than We Thought

Added: 2026-05-21

[00:00:00]Astronomers just discovered planets fully assembled in a star system that's only a million years old, >> [music] >> but our textbooks say that's impossible.

[00:00:07]Using the ALMA telescope, scientists spotted a young star called HL Tauri surrounded by a protoplanetary disk with something shocking, perfectly carved concentric rings and gaps. These aren't random features. [music] They're the fingerprints of planets actively carving through the dust and gas around their newborn star. Here's where it gets wild.

[00:00:26]Our current theory [music] says planets need at least 10 to 20 million years to form, yet HL Tauri is barely a million years old and its planets are already fully developed and massive enough to reshape their entire solar system. This means planets don't [music] gradually accumulate dust grain by grain over millions of years like we thought.

[00:00:44]Instead, they seem to assemble themselves almost instantaneously after a star ignites. It's like watching a house build itself in days instead [music] of years.

[00:00:54]This discovery is forcing planetary scientists to [music] completely rewrite their models of how solar systems form.

[00:01:00]Whatever mechanism is driving [music] planet formation is far faster and more efficient than anyone predicted.