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Solar System: Things to Know This Week

From observing our moon to Saturn’s mini solar system …here are a few things you should know about our solar system this week:

1. What a Long, Strange—and Revealing—Trip It's Been

As the Cassini mission builds toward its climactic "Grand Finale," we’re taking a look back at the epic story of its journey among Saturn's mini-solar system of rings and moons.

+ Traverse the timeline

2. Our Very Own Moon

Unlike Saturn, Earth has only one moon. Let’s celebrate it! International Observe the Moon Night (InOMN) is a worldwide, public celebration of lunar science and exploration held annually. On Oct. 8, everyone on Earth is invited to observe and learn about the moon together, and to celebrate the cultural and personal connections we all have with it. 

+ Join in

3. What's Up, October?

Even more about Earth’s moon is the subject of this month's video guide for sky watchers and includes a look at the moon’s phases and when to observe them. Also featured are a guide to upcoming meteor showers and tips on how to catch a glimpse of Saturn.

+ Take a look

4. Nine Lives

Dawn's discoveries continue, even as the asteroid belt mission marks nine years in space. "For such an overachiever," writes Dawn's top scientist, "it's fitting that now, on its ninth anniversary, the spacecraft is engaged in activities entirely unimagined on its eighth."

+ Learn more

5. The Incredible Shrinking Mercury

It's small, it's hot, and it's shrinking. Research funded by us suggests that Mercury is contracting even today. This means we now know that Mercury joins Earth as a tectonically active planet.

+ Get the small details

Discover the full list of 10 things to know about our solar system this week HERE.

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com