12:08
MAVEN Maneuvers Into Mars’s Orbit
MAVEN makes into Mars’s orbit in time to meet a comet and begin unraveling mysteries of the Martian atmosphere.
11:34
Water on Earth Is a Million Years Older Than the Sun
The cloud of gas and dust that eventually condensed to form the Sun contained “thousands of oceans of water,” says astronomer Ted Bergin.
5:31
A Jovian Moon With Earth-Like Tectonics
The icy surface of Jupiter’s moon Europa may undergo processes similar to plate tectonics on Earth.
17:20
Unraveling the Mysteries of Black Holes
High energy x-rays provide a rare glimpse into the behavior of black holes.
Classroom Strategy: Image of the Day
Three approaches for using images as gateways to instruction in grades 4-16.
11:41
Close-Up With a Comet
The European Space Agency’s Rosetta spacecraft is the first probe to orbit a comet.
13:47
Close Your Eyes and Listen to the Night Sky
If the bright “supermoon” drowns out the Perseid meteor shower this year, why not listen for meteors instead?
Build Your Own Radio Telescope to Listen to Meteors
Even if it’s cloudy or you can’t get outside at night, you can still listen to the Perseid meteor shower using a simple FM radio setup or by building a radio telescope at home.
Balloon Rockets
In this lesson from the Chemical Educational Foundation, apply the concepts of pressure and Newton’s laws of motion to build balloon rockets.
A Galaxy Bonanza
This photograph of the universe taken by Hubble reveals more than 10,000 galaxies, including young ultraviolet ones.