If you take a look at all the impact craters in our solar system, the vast majority are nice, neat circles. But why? Meteorites and asteroids strike planets and moons at all sorts of angles. Where are all the elliptical craters?

Our Milky Way galaxy is alive and well, producing new stars all the time. But there’s another group of galaxies out there, populated only by venerable red dwarf stars - the young stars are nowhere to be seen. In effect, these galaxies...

Finding a red nugget galaxy is like discovering a time capsule from the early universe.

The Milky Way is our neighborhood in the universe. It’s a galaxy and there are many others out there. Galaxies contain gas, dust, and billions of stars or more. They come in four main shapes: elliptical, spiral, peculiar, and irregular....

What happens when a satellite slows down in orbit? Learn how a small Δv transforms a circular path into an elliptical orbit, with step-by-step analysis of orbital energy, period, and arrival timing.

Howcast - Learn how to get the most out of the elliptical machine from certified personal trainer Max Tapper in this Howcast gym workout video.

Howcast - Learn how to flirt at the gym in this online flirting lesson from Howcast.

The James Webb Space Telescope has captured imagery of interacting elliptical and spiral galaxies known as Arp 107.<b<br/>r/>

Credit: NASA, ESA, CSA, STScI, Danielle Kirshenblat (STScI)

A launch mishap led to the best experimental confirmation of gravitational redshift.

The Hubble Space Telescope, active for over 30 years, has revolutionized our understanding of the universe by capturing stunning images of galaxies at various stages of evolution, from vibrant starbursts to dying elliptical remnants....

Planetary orbits are elliptical because gravitational interaction over time changes the delicate balance of mass, velocity and distance from the star which otherwise keeps planetary orbit circular. For a very long time, from Ptolemy to...

A collection of billions of stars, along with gas and dust, held together by its own gravity.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise...

How do we know how powerful the Sun's energy is from here on Earth? Measuring the surface area of an imaginary giant sphere holds the answer. Maths - Shape A Twig Math Film. Reinforce and extend the learning required by the curriculum....

Planetary orbits are elliptical because gravitational interaction over time changes the delicate balance of mass, velocity and distance from the star which otherwise keeps planetary orbit circular. For a very long time, from Ptolemy to...

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

This video provides an overview of the structure of our solar system and how gravity plays a crucial role in maintaining this structure. The video begins with the description of the sun at the center of our solar system, and then it...

Part II of The Scientific Revolution explores the latter half of this movement and the gradual acceptance of scientific truth. This fascinating period of history chronicles European society's emergence from church domination that...

It defines ellipse as the locus of a point, its associated terms. It also derives the Cartesian standard equation of ellipse.

This video discusses the concept of planetary movement or orbit. The video also touches on the different shapes of orbits, the forces of gravity that keep objects in orbit, and the balance between momentum and gravity that is necessary...

When a satellite is moving along an elliptical orbit, are linear momentum and angular momentum of the satellite conserved?

Is it too difficult for water to flow on Mars? Does Mars have evidence of lake beds or sea floors? Why did the water disappear?<br/>
Mars, Earths Closest Neighbor, Part 2

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

This show explores the fascinating features of the universe, the different types of galaxies in our solar system and the position of our solar system in the Milky Way Galaxy. Other terminology includes: constellations, spiral galaxy,...