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"Alright people, let's move on. Nothing to see here. You know that asteroid of death that whizzed by Earth today at an altitude that's actually below some of our satellites? You know that meteor that exploded in the skies over Russia today, injuring nearly 1,000 people? And you know all that speculation that they're somehow connected-that the Earth has stumbled into some kind of storm-front of space rocks, any one of which will annihilate us eventually? Forget it. The two incidents have absolutely nothing to do with each other, and neither one should cause us all that much worry. Yet."

"What environmental conditions are found on Earth and other planets? How do scientists measure and collect data on those conditions"

"National Geographic Entertainment's Wildest Weather in the Solar System is now playing in digital fulldome theaters and planetariums. This spectacular show will take you on a journey to witness weather extremes in our solar system like never before. These education resources, created to complement the Wildest Weather in the Solar System film, will help you bring content about the Earth-sun connection and extreme weather on Earth and other planets in our solar system to your classroom. Explore this collection to find hands-on multimedia activities, worksheets, lessons, interactives, and interactive whiteboard content."

"This full photo realistic animation of a complete cycle of the moon (known as a "synodic month" or "lunar month") was completed in collaboration with, and based upon photos taken by Steampunk artist Dr Tim Wetherell for his large wall mounted project "Clockwork Universe" commissioned and to be shown at Canberra's Questacon - National Science and Technology Centre."

"The Earth Moon Sun System. The orbit of the moon around the earth, the orbit of the earth around the sun, and a discussion of the relative sizes and distances. From the Physical Science course by Derek Owens."

"An extraordinary timelapse video created with pictures from the International Space Station shows Earth as it has never been seen before. The video, called Further Up Yonder, was made by Italian film student Giacomo Sardelli using Nasa stills. Sardelli calls the film a message from the ISS to all humankind "

"Ocean tides rise and fall twice a day, influenced by the gravitational forces of the sun and moon. Studying tides' rhythmic movements helps us understand both the ocean and the cosmos. Astronomer Ben Burress explains how tides work, and QUEST visits Crissy Field in San Francisco to see the oldest continually operating tidal gauge in the Western Hemisphere."

This infographic from Nova introduces students to the reasons that tides happen.

"Astronomers have a mind-blowing new theory: that there are 17 billion Earth-sized planets in our galaxy. They don't yet know how many of these worlds are in habitable zones, but the implications of this discovery are amazing. So much that some claim the "quest for a twin Earth is heating up." Simply put: If there are 17 billion Earth-sized worlds in our galaxy, it's clear that the Universe is bubbling with life."

"Join astronomers in a race to find a planet that can sustain life. Amid all the space in the universe, is there another world like ours? Astronomers studying a nearby star say they've found the first potentially habitable planet."

"We exist to make the capability of human travel beyond our solar system a reality within the next 100 years. We unreservedly dedicate ourselves to identifying and pushing the radical leaps in knowledge and technology needed to achieve interstellar flight, while pioneering and transforming breakthrough applications that enhance the quality of life for all on Earth. We actively seek to include the broadest swath of people and human experience in understanding, shaping and implementing this global aspiration. Taking up this task ignites not only our imagination, but the undeniable human need to push ourselves to accomplishments greater than any single individual."

"As a life support engineer at NASA Ames Research Center, it's Michael Flynn's job to keep astronauts alive in space, making sure they have the basic necessities like clean water to survive. But launching clean water into space is cost-prohibitive, so for years, Flynn and his team have been working on new ways to recycle waste water into safe, drinking water. SmartPlanet visits Flynn's lab and looks at how he's doing it through a process known as "forward osmosis.""

A video from a female astronaut on the International Space Station showing how she washes her hair.

"NASA eClips™ are short, relevant educational video segments. These videos inspire and engage students, helping them see real world connections."