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Afterglow of the big bang

Afterglow of the big bang

This is a detailed image of the afterglow of the big bang as taken by the Planck satellite. The afterglow comes from every direction in the sky with the blue color corresponding to cooler regions and the red corresponding to hotter regions. Much of our understanding of the composition and evolution of the universe comes from this image.

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Milky Way

Milky Way

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!

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The Hubble Deep Field

The Hubble Deep Field

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.

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The discovery of gravitational waves

The discovery of gravitational waves

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.

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The crazy board

The crazy board

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

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smith_tristan_list Tristan Smith

Assistant Professor of Physics

Department of Physics and Astronomy
Swarthmore College
Swarthmore, PA 19081

To view my CV click here.

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