Planet Tours
Planning to take a vacation soon? Visit Phobos! Small and cozy, Phobos orbits the fourth planet from the Sun in […]
Planning to take a vacation soon? Visit Phobos! Small and cozy, Phobos orbits the fourth planet from the Sun in […]
Without being informed of the expected product, the students will make a Play-doh model of the Earth-Moon system, scaled to
While not all of the planets rotate on their individual axes in the same direction — Uranus and Venus both
Do all planets orbit the Sun in the same direction? Read More »
In the winter of 1504, astronomer Nicolaus Copernicus watched as the planets Mars, Jupiter, and Saturn grouped close together in
The Solar System: Home Sweet Home Read More »
Yet many remained, and are still with us today: a small planet (and maybe more than one), icy planetesimals that
Remnants from the Beginning Read More »
The solar system’s outer realm contains four giant planets. The largest is Jupiter, at about 11 times Earth’s diameter. Despite
Realm of the Giants Read More »
The structures of the terrestrial planets are similar. Each planet has a layered structure that developed through a process called
Exploring Our Own Back Yard Read More »
That is a tricky question, which astronomers didn’t answer correctly until fairly recently. For a while, they thought the biggest
What is the biggest moon in the solar system? Read More »
Maps of the stars are nearly as ancient as human culture itself; inscriptions describing the positions of stars and constellations
Who made the first map of the universe? Read More »
No. On August 23, 2006, the International Astronomical Union decided that the solar system contains only eight planets. Pluto, which
Is there a tenth planet in our solar system? Read More »