5 Written questions
5 Matching questions
- The term retrograde motion from a planet refers to the
- A perfect circle is an ellipse with an eccentricity of
- Which of the following characteristics of an astronomical telescope is the most important for determining the angular resolution?
- The time period between two successive passages of a planet through the position of opposition is
- The declination of a star in the sky is defined as the angle between the
- a its synodic period.
- b temporary reversal of the planet's normal west-to-east motion past the background stars as seen from the Earth.
- c zero.
- d celestial equator and the star, measured along a great circle passing through both celestial poles.
- e diameter of the objective lens or mirror.
5 Multiple choice questions
- to obtain much better angular resolution or sharpness in the images.
- to the latitude of the location.
- parabolic shape.
- energy emitted by each square meter of the star's surface each second.
- at all wavelengths, with a peak at one particular wavelength (color).
5 True/False questions
If a modern astronomer describes a faint star as being in the constellation Cygnus, the Swan, you know that the star is → somewhere within a particular region of sky having definite boundaries.
An arc second is a measure of → angle
Why was adaptive optics developed? → The air molecules scatter blue light better than red light, so more blue light reaches our eyes.
Why were Newton's three laws so important to astronomy? → Newton's laws showed that planets can move around the Sun by themselves forever, without coming to rest.
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 → move steadily toward the red end of the spectrum.