New research identifies an unexpected source for some of earth's water.
- A lot of Earth's water is asteroidal in origin, but some of it may come from dissolved solar nebula gas.
- Our planet hides majority of its water inside: two oceans in the mantle and 4–5 in the core.
- New reason to suspect that water is abundant throughout the universe.
The greatest space program spinoff? Human collaboration.
- It might take going to another planet for different nations to finally, once and for all, learn how to get along with each other.
- What will we eat on Mars? We can't live off of a diet of potatoes alone. There are huge problems to solve, but recent technologies like 3D printing might help things move a lot faster, and be a lot less dangerous.
- Leland is a featured big thinker on season 2 of Mars on the National Geographic Channel. You can find out more information about the show here.
Our friendly neighborhood gas giant serves as a cosmic catcher's mitt.
- In 1994, a comet struck Jupiter, exploding on the gas giant's surface in an incredibly violent fireball.
- Such collisions are not uncommon for Jupiter. What is uncommon, however, are solar systems with planets like Jupiter.
- Without Jupiter, life on Earth might have been obliterated by comets and asteroids before it even got a chance to begin. The fact that Jupiter-like planets are so rare might be one of the reasons why we haven't found intelligent life yet.
Follow along as the InSight spacecraft crosses millions of miles to the red planet.
- NASA's new 8-episode podcast series, On a Mission, is a ride-along for its InSight mission to Mars.
- InSight will look beneath the Martian surface for a deeper understanding of its composition and history.
- Each episode makes for a compelling half hour of listening.
Around Halloween in 2015, astronomers discovered 'The Goblin'. Now, it's leading us to what some call Planet X.
- 'The Goblin' is a dwarf planet known more formally as '2015 TG387'. It was nicknamed The Goblin because of the 'TG' in its title, and because of the time of year it was discovered: Halloween.
- The Goblin has an extreme orbit: far-flung and elongated. It takes 40,000 years to make a complete orbit around the Sun.
- This cosmic anomaly is a clue. Astronomers hypothesize that The Goblin is being pulled into the gravitational field of a 'Super-Earth' planet in our solar system that is believed to exist but has never been seen: the mysterious Planet Nine or Planet X.
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