An equation for the law of universal gravitation is stated. The weight equation (W=m*g) is related to the law. An interactive Javascript form allows the user to practice determining the force of gravity and the acceleration of gravity...

An equation for the law of universal gravitation is stated. The weight equation (W=m*g) is related to the law. An interactive Javascript form allows the user to practice determining the force of gravity and the acceleration of gravity...

This site provides a moving diagram of a Lunar eclipse, showing Earth's umbra and penumbra and the appearance of the Moon as it passes through these shadow regions.

In this online textbook produced by the Smithsonian, students explore the phases of the moon, the moon's orbit, the origin of the moon, and the tides. Includes numerous inquiry-based activities.

An introduction to our solar system: the planets, our Sun and our Moon. Students begin by learning the history and engineering of space travel. They make simple rockets to acquire a basic understanding Newton's third law of motion. They...

A competition for students in Grades 5 and up, in which they design an experiment that would fly in space under conditions of microgravity. Winners in local competitions are chosen to submit their designs for inclusion in a...

This site has an activity to make a hand-held telescope. "The Hubble Space Telescope that's orbiting Earth right now is the size of a school bus, but you can make a model of it that you can hold in your hands!"

The Mission to Mars curricular unit introduces students to Mars-the Red Planet. Students discover why scientists are so interested in studying this mysterious planet. Many interesting facts about Mars are revealed, and the history of...

An image of a satellite orbiting above Earth.

The purpose of this lesson is to teach middle schoolers about how a spacecraft gets from the surface of the Earth to Mars. The lesson first investigates rockets and how they are able to get us into space. Finally, the nature of an orbit...

Kepler's Laws 1,2,3 including eccentricity of elliptical orbits. Good for reviewing planetary motions (NYS Earth Science).

The International Space Station is roughly the size of a six-bedroom house and weighs more than 320 cars- it's so large that no single rocket could have lifted it into orbit. Instead, it was assembled piece by piece while hurtling...

Resource has text information to compare Neptune with Earth. Includes Neptune observational data, orbital data, magnetosphere, and atmosphere. Also contains an image of Neptune that can be enlarged.

Students imagine that they are hovering next to the space shuttle in earth-orbit, and bump into another astronaut of equal mass. If the two astronauts holds onto each other, then how fast do they move after the collision?

Prolonged space travel plays a severe toll on the human body: microgravity impairs muscle and bone growth, and high doses of radiation cause irreversible mutations. As we seriously consider the human species becoming space-faring, a big...

A lesson plan that gives an overview of solar and lunar calendars, their history and lore. Also, of the day and the month, and their relations to the rotational period of the Earth and the orbital period of the Moon.For versions in...

This home page from NASA offers Venus images taken by Magellan and other highlights from the mission. In orbit around Venus for four years this mission provided maps of 98 percent of the surface of Venus that are more detailed than most...

Our solar system is filled with a wide assortment of celestial bodies - the Sun itself, our eight planets, dwarf planets, and asteroids - and on Earth, life itself! The inner solar system is occasionally visited by comets that loop in...

From ABC News in Science, Maggie Fox's article explores a new string of "exoplanets" discovered orbiting distant stars. This research leads to numerous possibilities, one of which being the existence of planetary systems containing life...

This is an amazing satellite image of the Nile River Delta as seen from orbit. Located in North East Africa, the Nile River is largely agreed to be the longest river in the world, reaching 6650 kilometres (4132 miles) in length. For more...