Extrasolar Planets Quiz >> Astronomy: Exploring Time and Space
TOTAL POINTS 9
1.True or False: Most of the extrasolar planets discovered up to this point have been Earth-sized (or smaller).
1 point
2.True or False: Computer models show that so-called “hot-Jupiters”, large gas-giant planets orbiting very close to other stars, formed further out and migrated closer to their stars.
1 point
3.The first exoplanets were discovered using the “Doppler Method”. The Doppler effect is the result of objects moving toward and away from an observer. When an object moves toward an observer, the wavelength becomes (shorter/longer) ________ and the color shifts toward the (blue/red) __________. When an object is moving away from an observer, the wavelength becomes (shorter/longer)__________ and the color shifts toward the (blue/red) ___________.
1 point
4.One way to detect and study exoplanets is by observing them directly. Because the stars they orbit are so bright, it is much easier to observe exoplanets in wavelengths other than visible light. By blocking out the light from their parent stars, exoplanets have been directly observed in which of these wavelengths of light:
1 point
5.The doppler and transit methods can be used together to understand the characteristics of exoplanets such as mass, size (or diameter), and distance from its star. Using the doppler method, we can get the (mass/size and diameter) __________ and distance from the star. And from the transit method, we get the (mass/size and diameter) __________ of the exoplanet.
1 point
6.True or False: The fact that astronomers have not yet detected many extra-solar planets similar to the mass of the Earth means they must be rare.
1 point
7.True or False: The Kepler space telescope was designed to detect extrasolar planets using the doppler method.
1 point
8.When an extrasolar planet passes between its star and our telescope it blocks some of the light, causing the star to briefly dim, this is called a transit.
During a transit, some of the light from the star will pass through the atmosphere around the edge of the planet, allowing astronomers to observe the spectrum of the planet’s atmosphere and identify the composition of the atmosphere. What kind of spectrum is being observed?
1 point
9.True or False: The “habitable zone” of an extrasolar planetary system is the range of distances from the star where water can exist as a liquid.
1 point
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