1) From the horizon to the observer's zenith is an angle of
90 degrees for everyone on the Earth.
The 26,000 year cycle that changes the poles and equinoxes is called
3) In the Kelvin scale, absolute zero lies at
4) Which of these was NOT seen telescopically by Galileo?
5) Into how many constellations is the celestial sphere divided?
6) The time for the Moon to orbit Earth, relative to the stars is
The amplitude is 4 and the wavelength is 6.
In an annular eclipse
The Sun appears as a thin, bright ring.
In Bohr's model of the atom, electrons
Only make transitions between orbits of specific energies
At what phase would you expect to find extremely high and low tides?
Both new and full moons
When a planet's orbit takes it closest to the Sun, it's called
A solar eclipse can only happen during a
Which of these is emitted when an electron falls from a higher to lower orbital?
The fact that the Earth has moved along its orbit in the time it took to rotate once is the reason for
The difference between solar and sidereal time.
The frequency of a water wave gives us its height.
A tropical year is the same as a sidereal year
According to Newton's second law, if you double the force acting on a body, the acceleration will double
A planet (or comet) will speed up as it approaches the Sun.
The closest terrestrial analog to hours of right ascension is angle of longitude.
In blackbody radiation, the energy is radiated uniformly in every region of the spectrum, so the radiating body appears black in color.
The greater the disturbance of the medium, the higher the amplitude of the wave
As a star's temperature increases, the frequency of peak emission also increases
According to Newton's third law, when the Voyager probes passed Jupiter in 1979, they exerted exactly the same force on Jupiter as the giant planet did on them.
The time interval of 365.242 days is defined as the ________
The apparent angular shift of any object across a distant background, when viewed from two different places, is called ________ shift.
Parallax or Parallactic
One of the requirements of the Scientific Method is that an experiment must be ________.
The product of the wavelength times the frequency of a wave is its ________.
A featureless spectrum, such as a rainbow, is said to be ________.
The most energetic photons are ________.
Gamma Rays or Gamma
A wave with a period of .01 seconds has a frequency of ________ Hz.
Galileo's discovery of four moons orbiting ________ provided new support for the ideas of Copernicus.
How is right ascension similar to longitude on Earth?
Both measure positions east or west from a fixed point; Greenwich on Earth, the vernal equinox in the sky.
How far above or below the ecliptic can the Sun move?
The Sun follows the ecliptic eastward across the sky, never leaving it.
What is meant by the astronomical unit?
The astronomical unit, or AU, is the mean distance between the Earth and Sun
What information about a star can be inferred from its Doppler shift?
The Doppler shift gives the star's radial velocity, either towards or away from us
What two regions of the electromagnetic spectrum are best utilized by ground-based astronomers, and why?
The atmosphere is opaque to most radiation except visible and radio waves.
Why was Copernicus' model much simpler than Ptolemy's?
To duplicate retrograde motion, Copernicus merely had the planets lapping each other as they revolved around the Sun at varying speeds. Ptolemy needed a complex set of deferents and epicycles to explain retrograde motion in his geocentric model.