5 Written questions
5 Matching questions
- Why was adaptive optics developed?
- Kepler's first law states that a planet moves around the Sun in a(n)
- In the geocentric model of the solar system developed by Ptolemy, the planets move
- When a solid body (or a dense gas such as a star) cools from a temperature of several thousand degrees, the color of the wavelength of maximum emission of radiation will
- An arc second is a measure of
- a elliptical orbit, with the Sun at one focus.
- b in circular epicycles while the centers of the epicycles move in circular orbits around the Earth.
- c angle
- d move steadily toward the red end of the spectrum.
- e to compensate for image distortion caused by the Earth's atmosphere.
5 Multiple choice questions
- closer to the Earth than the Sun is.
- Sun-centered, with the planets moving in perfect circles around the Sun.
- are 88 in number and cover the entire sky.
- 400 nm to 700 nm
5 True/False questions
The best shape for the cross-section of a simple astronomical mirror in order to produce the sharpest images of very distant objects at its prime focus is a(n) → parabolic shape.
What is the half-life of a sample of matter containing radioactive element? → time needed for half the radioactive atoms in the sample to decay.
The chemical makeup of a star's surface is usually inferred by → celestial equator and the star, measured along a great circle passing through both celestial poles.
What is the main reason for using several radio telescopes together as an interferometer? → to obtain much better angular resolution or sharpness in the images.
Which of the following is a critical component of the scientific method? → testing of prediction from a scientific theory or theoretical model.