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Video: Colliding atmospheres of Mars and Comet Siding Spring

Martian auroras? Or maybe a meteor shower? New NASA video about what Mars satellites might see when Comet Siding Spring passes close to Mars this October.

Video: Rosetta’s race to map its comet

Last week, ESA’s Rosetta mission accomplished the first-ever comet rendezvous. That is, it’s the first spacecraft ever to fly alongside a comet, which it will continue to do for the coming year. Now the mission is in a race against time to prepare maps and collect data before the mission’s Philae lander is sent down to the surface of the comet this November.

Video: Why does the moon look so big on the horizon?

The August 10 supermoon might look super big seen near a horizon. But all full moons look big near a horizon, due to an illusion called the moon illusion.

Perseid meteors versus the supermoon

Which is brighter – Perseid fireballs or a supermoon? You’ll find out as the year’s biggest, brightest full moon arrives as Perseid meteor shower starts to peak.

Watch this Great White chomp down on underwater sharkcam

REMUS SharkCam: The hunter and the hunted from Woods Hole Oceanographic Inst. on Vimeo.

In 2013, a team from the Woods Hole Oceanographic Institution took a specially equipped REMUS “SharkCam” underwater vehicle to Guadalupe Island in Mexico. Their goal was to film great white sharks in the wild. But the hunter soon became the hunted.

Five fun physics tricks

Check out – and try – five fun physics tricks. Can you figure out the physics behind these phenomena?

Video: Zoom to the center of the Milky Way

This zoom sequence stars with a view of our home galaxy, the Milky Way, then zooms in towards the crowded center of the galaxy, in the direction of the constellation of Sagittarius the Archer. Then the scene shifts to an infrared view, which lets us see see through the dusty clouds in this direction and get a close-up view of objects orbiting the supermassive black hole at the heart of the Milky Way galaxy.

This date in science: Mars Curiosity rover’s seven minutes of terror

August 5-6, 2012. Final seven minutes of Curiosity rover’s chilling descent to Mars on August 5-6, 2012 in one of the best NASA videos ever. Watch this!

Deep-sea octopus guards her eggs for nearly 4.5 years

The video above, from Monterey Bay Aquarium Research Institute (MBARI) in California, tells the story of the creature scientists have dubbed “Octomom,” a deep-sea octopus observed to guard her eggs for nearly 4.5 years. It’s the longest egg-brooding period of any known animal.

Webcam sees baby sea turtles hatch and head toward sea

Using infrared lighting, a live-streaming, high-definition turtle webcam – positioned on a beach in the Florida Keys – recorded the hatch and march to the sea of about 100 baby loggerhead sea turtles on Friday night, July 25, 2014.