Catalyst: Deep space telescope

“Catalyst” explores why astrophysicists launch a balloon carrying a 5,000-pound telescope into the stratosphere over Antarctica.

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In this segment:

Phil Mauskopf, PhD
Sam Gordon
Adrian Sinclair

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159 science documentaries you can watch right now (no membership required)

Nova Wonders "What's the Universe Made Of"

Is your brain is in desperate need of something enriching? Good news. We’ve got you covered. Below is a list of 161 of the best science documentaries and web series out there. All of these shows are available to watch right now without a membership.

'Endeavour' returns for an all-new season

In Season 7, Endeavour and his colleagues enter a new decade and era of change. Opening on New Year’s Eve 1969, normal order has been resumed and the team reunited, but the events of the past year have left their mark.

'Great Performances' brings more spectacular shows this summer

Television's longest-running performing arts anthology brings you the best in music, dance and theater.