Ranked #1
Chasing New Horizons: Inside the Epic First Mission to Pluto
Chasing New Horizons: Inside the Epic First Mission to Pluto
On July 14, 2015, something amazing happened. More than 3 billion miles from Earth, a small NASA spacecraft called New H... Read more
30 May 2018
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1hr 13mins
Ranked #2
Seth Shostak, New Approaches to Looking for E.T.
Seth Shostak, New Approaches to Looking for E.T.
For six decades, a tiny group of scientists has probed the cosmos for evidence of aliens. Is this an endless quest, or c... Read more
11 Feb 2019
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1hr
Ranked #3
Lisa Kaltenegger, Are We Alone in the Universe?
Lisa Kaltenegger, Are We Alone in the Universe?
The detection of thousands of exoplanets orbiting alien suns revolutionized our view of the cosmos—and the next generati... Read more
4 Jun 2018
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1hr 4mins
Ranked #4
Feryal Ozel, Black Holes: An Up Close and Personal Look
Feryal Ozel, Black Holes: An Up Close and Personal Look
The Event Horizon Telescope is an experiment that is being performed on a large and ever-increasing array of radio teles... Read more
14 Nov 2017
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55mins
Ranked #5
Kathryn Bywaters, SETI Institute: The Search for Life Beyond Earth
Kathryn Bywaters, SETI Institute: The Search for Life Beyond Earth
To search for life beyond Earth, we first have to decide on several key factors, such as where we should look. Several l... Read more
13 Mar 2018
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49mins
Ranked #6
J.R. Skok, Planetary Scientist, SETI Institute
J.R. Skok, Planetary Scientist, SETI Institute
Our journey toward Mars and beyond will be humanity’s greatest adventure. It will determine the fate of our species and ... Read more
10 Sep 2018
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58mins
Ranked #7
Meet the Neighbors: Searching for Nearby Planets with the Transiting Exoplanet Survey Satellite
Meet the Neighbors: Searching for Nearby Planets with the Transiting Exoplanet Survey Satellite
The NASA Kepler mission revealed that our Galaxy is teeming with planetary systems and that Earth-sized planets are comm... Read more
17 Apr 2018
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1hr
Ranked #8
Franck Marchis, Another Pale Blue Dot
Franck Marchis, Another Pale Blue Dot
In only two decades, we’ve gone from the mere speculation about planets beyond our solar system (“exoplanets”) to being ... Read more
14 Jan 2019
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58mins
Ranked #9
Seeing Our Universe in New Ways – the Infrared Sky Re-imagined
Seeing Our Universe in New Ways – the Infrared Sky Re-imagined
In recent decades, our ability to study the universe with telescopes detecting a range of wavelengths of light - enabled... Read more
17 Apr 2018
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1hr 6mins
Ranked #10
Bruce Macintosh, Kavli Institute for Particle Astrophysics and Cosmology, Stanford University
Bruce Macintosh, Kavli Institute for Particle Astrophysics and Cosmology, Stanford University
In less than three decades, more than three thousand planets have been discovered orbiting other stars. This has sparked... Read more
13 Aug 2018
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33mins
Ranked #11
Seth Redfield, The Interstellar Medium
Seth Redfield, The Interstellar Medium
It is important to know what is going on in your neighborhood, and that is also true of the immediate vicinity of our Su... Read more
15 Oct 2018
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52mins
Ranked #12
Matthew Tiscareno - Farewell to Saturn
Matthew Tiscareno - Farewell to Saturn
Cassini’s 13 years at Saturn have made it the most spectacularly successful interplanetary mission in the history of NAS... Read more
11 Sep 2017
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56mins
Ranked #13
Jill Tarter, The 21st Century: The Century of Biology on Earth and Beyond
Jill Tarter, The 21st Century: The Century of Biology on Earth and Beyond
This century will permit us the first opportunities to study biology beyond Earth; biology as we don’t yet know it, and ... Read more
7 Aug 2017
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44mins
Ranked #14
Ruth Angus and David Charbonneau, The Two Sides of Kepler: Planets and Stars
Ruth Angus and David Charbonneau, The Two Sides of Kepler: Planets and Stars
To coincide with the Kepler & K2 Science Conference taking place in Mountain View, the Academy is pleased to host a ... Read more
19 Jun 2017
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59mins
Ranked #15
Stephen Kane, The Diversity of Alien Worlds
Stephen Kane, The Diversity of Alien Worlds
Over the past few decades, hundreds of new planetary systems have been discovered, many of which show remarkable diversi... Read more
4 Apr 2017
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40mins
Ranked #16
Carolyn Porco, Cassini to Saturn: The Journey and the Legacy
Carolyn Porco, Cassini to Saturn: The Journey and the Legacy
Twenty-six years ago, the United States and Europe joined hands and set off together on a spectacular adventure. It was ... Read more
24 Oct 2016
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48mins
Ranked #17
Mark Krumholz, Professor, Astronomy & Astrophysics Dept. UC Santa Cruz - 7/6/15
Mark Krumholz, Professor, Astronomy & Astrophysics Dept. UC Santa Cruz - 7/6/15
We’ve all learned that space is an empty vacuum, but it’s not. The space between the stars in our Galaxy contains, on av... Read more
10 Aug 2016
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57mins
Ranked #18
Yashar Hezaveh, Unveiling the dark universe: A tale of fish tanks, wine glasses, and the smallest dark matter clumps
Yashar Hezaveh, Unveiling the dark universe: A tale of fish tanks, wine glasses, and the smallest dark matter clumps
What is "dark matter?" This is a question that has preoccupied astrophysicists for many decades. Observations show that ... Read more
1 Aug 2016
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49mins
Ranked #19
Renu Malhotra, Department of Planetary Sciences, University of Arizona, Pluto Matters
Renu Malhotra, Department of Planetary Sciences, University of Arizona, Pluto Matters
Our understanding of the history of the solar system has undergone a revolution in recent years, owing to new theoretica... Read more
9 May 2016
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55mins
Ranked #20
Saturn's Moons
Saturn's Moons
Did a moon form Saturn's rings? Do the building blocks for life exist on Titan? Seltzer water inside Enceladus? Here are... Read more
27 Dec 2015
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2mins