We want to know if there's life thriving in under-ice oceans of Jupiter's moon Europa.īut my favorite question is one that we don't even know to ask yet because it's a question that would arise upon answering these questions I just delivered to you. We don't know whether or not the universe is actually one of many in a multiverse. We don't know what is at the center of a black hole. We don't know what was around before the universe. We got top people working on that as well. We don't know how went from inanimate organic molecules to self-replicating life. We call that dark matter, but what we should call it is "dark gravity." We don't know what that is either. We account for all the matter and energy that we're familiar with, measure up how much gravity it should have - it's about one-sixth of the gravity that's actually operating on the universe. Then 85 percent of the gravity of the universe has a point of origin about which we know nothing. We don't know what that is, we don't know anything about it, other than what it's doing to the universe. We can measure the influence of this thing we call dark energy, which is forcing an acceleration of the expanding universe. On the big questions astronomers are trying to answer So really, Pluto was never the ninth planet it was the first of a new class of objects that we didn't really discover the rest of until the early 1990s. By the way, there are six moons in the solar system that are bigger than Pluto including Earth's moon, which is five times the mass of Pluto. Now, we have words for objects that cross the orbits of other planets and are made of mostly ice they're called comets. Pluto, its orbit is elongated so severely that it crosses the orbit of Neptune.
![the cosmos a spacetime odyssey the cosmos a spacetime odyssey](https://i-viaplay-com.akamaized.net/viaplay-prod/306/720/1543323684-f68f7782b807f7f88ce92f67c7698ee6f44f63a9.jpg)
So if you moved it to where Earth is right now, heat from the sun would evaporate the ice and it would grow a tail. So Pluto is not only the littlest planet, all right, that alone shouldn't hurt it, but more than half of its volume is ice. Space Astrophysicist Chronicles The Battle Over Pluto There he was on the screen, but he was really with you in the living room." "His style was very conversational and fireside-chatty.
![the cosmos a spacetime odyssey the cosmos a spacetime odyssey](https://64.media.tumblr.com/26443978010f85cbd4d8166c742393ef/tumblr_n6m5rxG0oX1slpe6vo1_1280.jpg)
It was "proof that a scientist can communicate with the public in a manner that was very different from a professor in front of a classroom or pontificating from up on high," Tyson tells Fresh Air's Dave Davies. Tyson was entering graduate school in astrophysics at the time and remembers watching Carl Sagan host the original Cosmos.
![the cosmos a spacetime odyssey the cosmos a spacetime odyssey](https://pixhost.icu/avaxhome/12/91/00689112.jpg)
THE COSMOS A SPACETIME ODYSSEY UPDATE
It's an update of the influential 1980 PBS series Cosmos: A Personal Journey.
![the cosmos a spacetime odyssey the cosmos a spacetime odyssey](https://m.media-amazon.com/images/M/MV5BNTQ0MTg0NDY2MV5BMl5BanBnXkFtZTgwNDc5NzAyMzE@._V1_.jpg)
THE COSMOS A SPACETIME ODYSSEY TV
This spring, Tyson hosts a new TV series called Cosmos: A Space-Time Odyssey. He's hosted a four-part series on Nova and appeared everywhere from The Tonight Show to The Daily Show to Wait Wait. Tyson, director of the Hayden Planetarium at the Museum of Natural History in New York, is a prolific writer and frequently cited authority on astronomy in the popular media. But if you ask Neil deGrasse Tyson how he became an astrophysicist he says: "I think the universe called me. When it comes to "callings" we usually think of people who feel drawn to religious career paths. It's an update of the influential 1980 PBS series Cosmos: A Personal Journey, hosted by Carl Sagan. Astrophysicist Neil deGrasse Tyson hosts a new TV series called Cosmos: A Space-Time Odyssey.