What’s out there in the universe?

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In the last two decades, knowledge about our universe has exploded. Thanks to sophisticated instruments and space-traveling telescopes, we’ve gleaned astonishing new information about dark energy, dark matter, black holes, exoplanets and the nature of the early universe. Pluto, it turns out, may have water. Several of Jupiter’s moons show signs of vast underground oceans. Our own Milky Way galaxy is filled with stars that host planets like our Earth.

Abraham “Avi” Loeb, Chair of Harvard’s Department of Astronomy and C. Meghan Urry, Director of Yale University’s Center for Astronomy and Astrophysics, take us on a tour of these remarkable discoveries.

Moderated by Claudia Dreifus, who writes the “Conversation with…” feature in the Tuesday Science Section of The New York Times.