Comets get significantly brighter in our skies as they approach the Sun because
A) The reflect more sunlight as they get closer to the source of light
B) The tail gets bigger as the ice sublimates
C) They get closer to the Earth than when they were outside the orbit of Mars
D) They most faster and faster
E) More than one of the above
Answer: E
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Astronomy Exam
- Estimate the angular resolution of the human eye.
- Hydrostatic equilibrium in our Sun is the balance between:
- By what mechanism does solar energy reach the Sun's photosphere from the layer just underneath it?
- The body which wiped out the dinosaurs was about:
- Meteor shower debris is believed to come from:
- Long period comets are thought to reside mainly in the:
- What are comets made of?
- Why do researchers believe that asteroids in the asteroid belt are primal rocks that did not merge into a planet?
- Which of the following greatly improves the angular resolution of radio maps?
- The Arecibo radio telescope is laid out like which optical telescope design?
- Green light has a shorter wavelength than orange light. In a 5-inch telescope, green light will:
- What are two advantages of large scopes over smaller ones?
- It is diffraction that limits the _________ of a telescope of a given objective diameter.
- A telescope with a 60 mm objective lens collects how many times as much light as does your eye's 6 mm exit pupil?
- If the rest of wavelength of a certain line is 600 nm, but we observe it at 594 nm, then:
- The broadening of spectral lines can be caused by:
- Why are the molecular lines more complex than elemental spectral lines?
- The Balmer beta absorption line is a result of a transition of an electron in a hydrogen atom from:
- The Fraunhofer lines in the solar spectrum are actually:
- The Orion Nebula, M-42, is a hot, thin cloud of glowing gas, so its spectrum is:
- Which of these is the classes continuous spectrum?
- Typical stellar spectra appear as:
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- What two energy transport mechanisms, in order from outside the core to the surface, are found in the Sun?