Learn the key characteristics of comets, including their icy composition, the formation of their tails as they approach the sun, and their historical significance. The video also highlights the role of comets in bringing water and...

The Earth’s busy orbit is occupied by space junk, nearly 5,000 artificial satellites, the Moon and now a possible temporary resident ‘minimoon’ called 2020 CD3. <br/>

We know that there are lots of asteroids and comets in the solar system, and we've even landed a spacecraft on a comet, so we know a reasonable amount about these objects. However in 2017, something happened that had never happened...

Nebulae are some of the most resplendent objects in the universe, but it’s easy to confuse which one is an “emission nebula,” and which one is an “absorption nebula.”
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Thankfully, this “Field Guide”...

Have you ever wondered what cosmic disasters threaten earth? Dr. Philip Plait answers your question in this special “Mysteries of the Cosmos” edition of Ask a Scientist.

Not all big, Earth-threatening asteroids are spotted before they come uncomfortably close to hitting Earth. <br/>

The Hubble Space Telescope has made over 1.5 million observations since its launch in 1990, capturing stunning subjects such as the Eagle Nebula and producing data that has been featured...

NASA’s Hubble Space Telescope has determined the size of the largest icy comet nucleus ever found. And, it’s big! With a diameter of approximately 80 miles across, it’s about 50 times larger than typical comets. Its...

The OSIRIS-REx Asteroid Sample Return Mission is going to an asteroid to return a sample to Earth. The OSIRIS-REx spacecraft will launch in 2016, visit the asteroid in 2019-2020 and return a sample to Earth in 2023. Scientists...

Impact from a comet around 12,800 years ago is believed to have wiped out a human settlement, according to new research published in Scientific Reports. <br/>

This live-action video program is about the word Comet. The program is designed to reinforce and support a student's comprehension and retention of the word Comet through use of video footage, photographs, diagrams and colorful, animated...

What is OPAL?



OPAL (Outer Planet Atmospheres Legacy) is a project to obtain long time baseline observations of the outer planets in order to understand their atmospheric dynamics and evolution as...

Asteroids, comets, and meteors: what's the difference? These space rocks each have their own unique attributes. But differences aside, these fascinating objects are all worthy of study. Just ask @NASA Jet Propulsion Laboratory...

Where are the impacts on Earth? What is the asteroid belt? Are there collisions in the asteroid belt? How do we find old craters?<br/>
Threatening Asteroids From Space, Part 1

In this video, we're going to look at the three different types of triangle construction.

This video explains the difference between meteoroids, meteors, and meteorites. They discuss the history of meteors and how they were once believed to be fireballs or signs of impending doom. The video also covers the origin and...

Satellite footage, telescopic photos and animation are used to teach students about the many fascinating aspects of our solar system. Viewers are introduced to ancient astronomers, telescopes, observatories and space exploration....

Over the years, the Hubble Space Telescope has taken hundreds of images of different kinds of incredible nebulae in our universe.
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A nebula is a giant cloud of dust and gas in space. There are...

Servicing Mission 3B was actually the fourth visit to Hubble. NASA split the original Servicing Mission 3 into two parts and conducted 3A in December of 1999. During SM3B a new science instrument would...

NASA's OSIRIS-REx spacecraft will attempt a daring feat: to briefly reach out its mechanical arm and grab a sample from an asteroid’s surface. Dante Lauretta, Heather Enos, and Ron Mink introduce you to NASA’s asteroid hunter and what...

Solar system components

The theory that the asteroid which made all non-avian dinosaurs extinct also sent a mile-high tsunami crashing into North America has been further confirmed by the discovery of fossilised ‘megaripples.’