Asteroids, ice moons, comets, and exoplanets Flashcards Preview

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Flashcards in Asteroids, ice moons, comets, and exoplanets Deck (20):
1

What was the name of the first asteroid ever discovered?

Ceres

2

What are icy planetesimals that survive planetary accretion?

comets

3

Kepler-16b is the first circumbinary planet the Kepler discovered. "Circumbinary" means:

Its distance from its star computes to a number composed of 1s and 0s.

4

Most icy moons belong to which type of planet?

Giant planets

5

What differentiates a comet from an asteroid?

The presence of an extended, gravitationally unbound atmosphere surrounding their central nucleus.
The temperature of comets exceeds that of asteroids

6

The closest point in a comet's orbit to the sun is called its:

Perihelion

7

The main asteroid belt lies between the orbits of

Mars and Jupiter

8

Meteor showers are caused by___

Comet trails

9

Icy planetesimals in the outer Solar System remain today as what?

Comet nuclei

10

What is a method that is used to identify extrasolar planets?

The Radial Velocity Method
The Transit Method
Gravitational Lensing
Astrometry

11

True or False: An exoplanet is a planet that is only a shell and is hollowed out in the middle.

False

12

Long-period comets have an orbit _______ and short-period comets have an orbit _________.

longer than 200 years; shorter than 200 years

13

What was the first periodic comet to be recorded?

Halley's comet

14

Planetary researchers have constructed a shading device that will potentially be used to view exoplanets more clearly. This device is known as a ___________.

Star Shade

15

What is a low-temperature volcano that can be found on ice moons in which the magmas are composed of molten ices rather than rocky material?

cryovolcano

16

Active comets are:

those that are close enough to the Sun to show solar heating

17

_________ means taking a picture of the planet directly

direct imaging

18

What is the name given to the closest exoplanet that has already been discovered?

Proxima Centauri B

19

The term exoplanet describes which of the following?

a planet that orbits a star outside the solar system

20

How many exoplanets have been confirmed?

1,838