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Ask an Astronomer: How Do You Discover an Asteroid?

2 minutes 4 seconds

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Dr. Bidushi Bhattacharya explains how astronomers find tiny space rocks. Since asteroids don't move in a predictable orbit, astronomers must take a series of photographs to track the asteroids. Part of the "Ask an Astronomer" series.

Media Details

Runtime: 2 minutes 4 seconds

Topic: Science
Subtopic: Astronomy, Physics, Space Sciences
Grade/Interest Level: 7 - 12
Standards:

Release Year: 2008
Producer/Distributor: NASA Jet Propulsion Lab
Series: Ask an Astronomer
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Ask an Astronomer Website

An Illustration depicts the three positions of the universe. The difference between the first two and the last two positions is labeled, + 2 units. The difference between the first and last positions is labeled, + 4 units. Caption: the more the expansion pushes them apart.

The celestial image of a red starry surface. Caption: Where new stars are born,

Sun and a red planet in outer space. Caption: we can tell what comprises the atmospheres.

An image of the outer space. Caption: it's eventually blocks out all visible light.

A huge mass of hot gas swirls into a star. Caption: that swirls onto the massive star.

A galaxy fades out. Caption: The original galaxy would be gone.

An electromagnetic spectrum with a bright star over the infrared range. Caption: Hotter objects glow in visible light.

illustration of asteroids revolving the sun and other planets. Caption: Asteroids, though, move across the sky at different rates.

Illustration of a wave striking an atom. Caption: The shortest wavelength light are gamma rays,

Illustration of a woman talking to the Alien M51. Caption: You've got to move the earth back where it belongs.