5 Written questions
5 Matching questions
- When Saturn is closest to the Earth, it is at
- If a modern astronomer describes a faint star as being in the constellation Cygnus, the Swan, you know that the star is
- In the 1860s, James Clerk Maxwell carried out important investigations on the nature of light when he
- One difference between violet light and red light is that
- In the system of celestial coordinates that matches latitude and longitude on the Earth, which in the coordinate that is equivalent to longitude?
- a somewhere within a particular region of sky having definite boundaries.
- b opposition.
- c proved mathematically that light could b described by oscillating electric and magnetic fields.
- d Right ascension
- e violet light has a shorter wavelength than red light.
5 Multiple choice questions
- shows absorption features where light has been absorbed by the atoms of the cool gas.
- elliptical orbit, with the Sun at one focus.
- temporary reversal of the planet's normal west-to-east motion past the background stars as seen from the Earth.
- visible light, UV radiation, X rays, gamma rays
5 True/False questions
One light-year is the → distance that light travels in one year.
The ecliptic can be defined as the → path traced out by the Sun in our sky over one year against the background stars.
In the geocentric model of the solar system developed by Ptolemy, the planets move → celestial equator and the star, measured along a great circle passing through both celestial poles.
The Copernican system for planetary motion is → are 88 in number and cover the entire sky.
Why was adaptive optics developed? → The air molecules scatter blue light better than red light, so more blue light reaches our eyes.