Hubble Science: Gravitational Lensing, Nature’s Boost

The video discusses galaxy clusters held together by gravity, which distort space-time as predicted by Einstein. Using the Hubble Space Telescope, scientists observe gravitational lensing, where light from distant galaxies is bent, allowing for detailed observation. This lensing effect also helps map dark matter distribution in galaxy clusters, revealing that most mass in these clusters is dark matter, not visible stars.

What holds clusters of galaxies together?

• Magnetic fields

• Electromagnetic forces

• Dark energy

• Mutual gravity

What phenomenon allows us to see distortions in space around galaxy clusters?

• Black hole formation

• Gravitational lensing

• Supernova explosions

• Cosmic microwave background

How does gravitational lensing affect our observation of background galaxies?

• It makes the galaxies disappear

• It magnifies and distorts the galaxies

• It changes the color of the galaxies

• It dims the light from the galaxies

What is the primary component of mass in galaxy clusters that distorts space?

• Dark matter

• Gas clouds

• Black holes

• Visible stars

What tool has been crucial in mapping the distribution of dark matter in galaxy clusters?

• James Webb Space Telescope

• Chandra X-ray Observatory

• Kepler Space Telescope

• Hubble Space Telescope