The spherical shell around the solar system that produces comets, which rarely h

ID: 77699 • Letter: T

Question

The spherical shell around the solar system that produces comets, which rarely have orbits that bring them to the inner solar system, is called the:

-Belt of Orion.

-Planetesimals.

-Regolithic Belt.

-Oort Cloud

Which of the following is a FALSE statement?

- Stars that appear the brightest are of the first magnitude, while the faintest stars visible to the unaided eye are of the sixth magnitude.

- Most stars have such small parallax shifts that accurate measurement is always possible.

-Stellar parallax is the extremely slight back-and-forth shifting in the apparent position of a nearby star due to the orbital motion of the Earth.

-Emission nebulae are gaseous masses that consist largely of hydrogen.

The final stage of evolution of the most massive stars is a:

- black hole.

- main-sequence star.

-red giant.

-white dwarf.

The discovery that the universe appears to be expanding led to a widely accepted theory called:

-the Big Bang.

-Hubble's Law.

-Einstein's Law.

-the Doppler Effect.

According to the Ptolemaic (Greek) model of the universe, how many "heavenly" bodies could be observed wandering along the background of stars?

-One

- Nine

-Five

-Seven

1) -Regolithic Belt.

2)-Stellar parallax is the extremely slight back-and-forth shifting in the apparent position of a nearby star due to the orbital motion of the Earth.

3) black hole.

4) -the Big Bang.

5) - seven

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