We know a lot about dark matter, but we're still learning. Data from NASA's Hubble Space Telescope isn't in sync with all aspects of the theoretical models about dark matter, suggesting that there's a missing element to the models. Find out how the team learned about it: https://go.nasa.gov/2GHQQao | NASA - National Aeronautics and Space Administration

36K views · 314 reactions | Learn all about dark energy — the mysterious force thought to be responsible for the universe's accelerating expansion — in the second episode of the astrophysics video-explainer series "We Don't Planet." More on the episode: https://goo.gl/9BXplX | Space.com | Facebook