Deep Science | Documentary Tapes

NASA Shares Visuals of Two Galaxies Forming 'Cosmic Rose' The Hubble Space Telescope has captured a unique three-dimensional view of Arp 273 that is spread far across space and time. The two interacting galaxies, by their mutual gravitational pull has formed a beautiful galactic masterpiece that looks like a rose.

  If You Think Jupiter Orbits the Sun, You're Mistaken Jupiter really does not orbit the Sun. Here is why ? If we picture the solar system, we often picture our dominant star at the center of things, static and immobile as planets orbit circles around it. That picture makes things simple to understand, but technically it's inaccurate. Take our largest planet  Jupiter , for instance. It doesn't orbit the sun's center — it orbits a spot in empty space between it and the sun called  the barycenter . This is because the sun doesn't just exert gravity on Jupiter — Jupiter's so big that its own pull affects how the sun moves, too. The sun is about 1,000 times more massive than Jupiter, and these two bodies affect one another proportionally according to distance and mass, so the amount Jupiter's gravity pulls on  the sun  is one-thousandth the amount the sun's gravity pulls on Jupiter. And Jupiter's orbit takes 11.8 Earth years to complete, and the sun trav...

Crashing Spacecraft into Saturn : Cassini Mission Exploring Saturn                                   Artist's concept of Cassini diving between Saturn and its innermost ring. About the Mission After two decades in space, NASA's Cassini spacecraft has ended its remarkable journey of exploration. Having expended almost every bit of the rocket propellant it carried to Saturn, operators deliberately plunged Cassini into the planet to ensure Saturn's moons remain pristine for future exploration—in particular, the ice-covered, ocean-bearing moon Enceladus, but also Titan, with its intriguing pre-biotic chemistry. Beginning in 2010, Cassini began a seven-year mission extension in which it completed many moon flybys while observing seasonal changes on Saturn and Titan. The plan for this phase of the mission was to expend all of the spacecraft's propellant while exploring Saturn, ending with ...

Death Of Universe : Will the Universe End Forever ?      Deep Science Documentaries Tapes   Don't panic, but our planet is doomed. It's just going to take a while. Roughly 6 billion years from now,   the Earth will probably be vaporized when the dying Sun expands into a red giant and engulfs our planet . But the Earth is just one planet in the solar system, the Sun is just one of hundreds of billions of stars in the galaxy, and there are hundreds of billions of galaxies in the observable universe. What's in store for all of that? How does the universe end? The science is much less settled on how that will happen. We're not even sure if the universe will come to a firm, defined end, or just slowly tail off. Our best understanding of physics suggests there are several options for the universal apocalypse. It also offers some hints on how we might, just maybe, survive it. Our universe has been expanding since it began (Credit: Chris Butler/SPL) Our first clue to th...