Skip to content
World 2 · The Expanding Universe · 12 min · PRO

Accelerating: dark energy

The surprise of 1998

PRO · Cosmos: Big Bang to Now

World 2: The Expanding Universe is part of PRO

The first world of Cosmos: Big Bang to Now is free. PRO opens the other 25 lessons in 6 worlds — simulations, quizzes and all.

  • No centre, no edge: the raisin-bread universe
  • The scale factor: a ruler that stretches
  • The age of the universe: running the film backwards
  • Stretched light: Doppler vs cosmological redshift
  • Reading redshift in a spectrum
PRO includes
  • All 60 labs — every world, every lesson
  • Practice exams and certificates

$8.33/mo, billed yearly ($99.99) · or $39.99 monthly

Unlock Cosmos: Big Bang to NowTry the free world
My notes
Only saved in this browserAll my notes →
← The age of the universe: running the film backwardsStretched light: Doppler vs cosmological redshift →

Report a mistake

What is wrong?
0 / 2000 · at least 10 characters
Sent along with your report
  • Page
  • About Accelerating: dark energy — Cosmos: Big Bang to Now · cosmos/accelerating
Plus your browser type. Reports go to our support system; see the privacy notice.