Question 1

Dusty and gaseous material orbiting a star is called a(an) _____.&#10;A) exoplanet&#10;B) protoplanetary disk&#10;C) Doppler disk&#10;D) brown dwarf disk

Accepted Answer

Protoplanetary disks are structures composed of dust and gas orbiting around young stars, where planets can form.

Question 2

Planets orbiting stars are called _____.&#10;A) exoplanets&#10;B) planetary disks&#10;C) proper motion disks&#10;D) transit disks

Accepted Answer

Exoplanets, also known as extrasolar planets, are planets that orbit a star other than our Sun.

Question 3

A new theory about many planets orbiting other stars is they formed and then ______ to their present position.&#10;A) migrated&#10;B) transited&#10;C) depleted&#10;D) proper motioned

Accepted Answer

The correct term is "migrated." In astrophysics, planetary migration is the theory that planets can move from their original orbits to new positions after formation, often closer to or further from their host star.

Question 4

The Doppler shift method of detecting exoplanets is possible because&#10;A) a star spins faster as planets orbit it.&#10;B) a star spins slower as planets orbit it.&#10;C) a star wobbles as planets orbit it.&#10;D) a star changes color as planets orbit it.

Accepted Answer

The Doppler shift method, also known as the radial velocity method, detects exoplanets by observing the wobble in a star's motion caused by the gravitational pull of an orbiting planet. This wobble results in shifts in the star's spectral lines due to the Doppler effect, indicating the presence of a planet.

Question 5

Failed stars called _________ are too small to sustain nuclear fusion.

Accepted Answer

The answer of Failed stars called _________ are too small...

Question 6

It is now thought that many planets formed and then ____ to their present positions.

Accepted Answer

The answer of It is now thought that many planets...

Question 7

The largest majority of planets found around other stars are earthlike in their masses.

Accepted Answer

Most planets discovered around other stars, known as exoplanets, are larger than Earth, often resembling gas giants like Jupiter more than Earth in terms of mass.

Question 8

We use the Doppler Shift Method to detect exoplanets.

Accepted Answer

The Doppler Shift Method, also known as the Radial Velocity Method, is used to detect exoplanets by observing the changes in the light spectrum of a star as it moves towards or away from us, indicating the gravitational influence of an orbiting planet.

Deck 36: Other Planetary Systems