The sixth planet from the Sun, Saturn is a gas giant that’s best known for its striking icy rings. How old are the rings, and how are they changing over time? And what’s up with Saturn’s mysterious hexagon-shaped storm in the north polar region? In this episode of Gravity Assist, NASA’s Planetary Science Director Jim Green talks with Cassini Project Scientist Linda Spilker about the ringed planet, its fascinating moons and propeller-like features, and the most startling discoveries from NASA’s Cassini mission.
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Our solar system is a wondrous place with a single star, our Sun, and everything that orbits around it - planets, moons, asteroids and comets - what do we know about this beautiful solar system we call home? It's part of an even larger cosmos with billions of other solar systems.
With Jim Green today is the “man about Mars,” Bruce Jakosky from the University of Colorado. Bruce is the principal investigator of NASA's MAVEN mission. Joining them is Michael Meyer the lead Mars scientist at NASA Headquarters.
In 1968, Apollo 8 placed humans into lunar orbit for the first time. As the astronauts in their spacecraft emerged from behind the Moon, they were surprised and enchanted by an amazing view of Earth rising over the lunar horizon. Bill Anders quickly snapped a picture of the spectacular Earthrise.
Humankind viewed their planet and saw not a jigsaw puzzle of states and countries on an uninspiring flat map – but rather a whole planet uninterrupted by boundaries, a sphere of dazzling beauty floating alone in the void.
NASA has selected two finalist concepts for a robotic mission planned to launch in the mid-2020s: a comet sample return mission and a drone-like rotorcraft that would explore potential landing sites on Saturn’s largest moon, Titan.
An innovative interpretation of X-ray data from a cluster of galaxies could help scientists fulfill a quest they have been on for decades: determining the nature of dark matter.
Are microwaves really just a form of light? What exactly is the electromagnetic spectrum? While our eyes can't see most of this spectrum, except for visible light, we have developed technologies such as giant radio dishes, infrared cameras, x-ray scanners, and utraviolet satellites to peak into the "invisible" world around us.
Did you know the Moon is slowly moving away from Earth and that the Moon has water? Jim Green is joined by lunar expert Sarah Noble to discuss how the Moon was formed, lava tubes and moonquakes, the “dark side of the Moon,” and mysteries we have yet to solve about Earth’s nearest neighbor.
The annual Geminid meteor shower has arrived. It's a good time to bundle up, go outside and let the universe blow your mind!
A new NASA policy will give science and engineering communities a revised roadmap to allow more opportunities to conduct innovative science and technology from space.