This old star chart shows the two hemispheres of the night sky with a grey band indicating the Milky Way- a diffuse band of light that stretches across the entire sky. This band of light is due to the billions upon billions of stars that make up the galaxy that we live in, also named the Milky Way. The concept that we live in galaxy may seem a bit foreign at first, but this image shows that we can see evidence for it with our own eyes!

The Hubble Deep Field is an image taken by the Hubble Space Telescope over a very long exposure. The image shows light that has come from nearly the observable edge of the universe, a distance of about 13 billion light years. Each speck in this image is a galaxy, allowing us to estimate that the observable universe contains between 100-200 billion galaxies.

For the first time in human history, gravitational waves were measured directly by the LIGO collaboration. We now live in the era of gravitational wave astronomy.

This whiteboard shows two weeks of work to understand the way in which dark matter perturbations evolve in an expanding universe.