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Astronomy Exam I
Notes from Exam
| Question | Answer |
|---|---|
| What is the zero point for altitude? | Horizon |
| The above, or below, the celestial equator is... | Declination |
| What are the Right Ascension & Declination coordinates of the Summer Solstice? | 6h, 23.5 degrees |
| What is the apparent path of the Sun in the sky? | Ecliptic |
| When you are standing at 34 degrees North Latitude, what is the altitude of the North Celestial Pole? | 34 degrees |
| What is the old definition of a constellation? | A connect-the-dot image in the sky |
| What do we learn from Bayer designation? | A star's brightness relative to other stars in its constellation |
| How long does it take for the Moon to complete one orbit of the Earth? | 27.3 days |
| The period of the Moon's phases is it's: | Synodic Period |
| In correct order, what is the missing Moon phase: 1st quarter, __________, Full? | Waxing Gibbous |
| On December 22nd, what phase is the Moon in when it is located at the Summer Solstice? | Full |
| What phase would the Earth appear to be in if we could view it from the Moon during the Waning Gibbous phase? | Waxing Crescent |
| During which type of eclipse is the Sun's corona visible? | Total Solar |
| Which of the following must be true for the lunar eclipse to occur? | The Moon must be full and at a node |
| A geocentric model, with the planets orbiting the Sun | Tycho Brahe |
| Used epicycles to explain retrograde motion | Ptolemy |
| A heliocentric model, using elliptical orbits | Johannes Kelper |
| The basis of the Prutenic Tables | Nicolaus Copernicus |
| Which of the follow was one of Galileo's discoveries? | Sunspots |
| What does Kelper's 2nd Law tell us? | Equal area is swept out in equal time |
| What does Newton's 1st Law tell us? | An object at rest will stay at rest, unless acted upon by a force |
| Einstein's photoelectric effect showed that light... | Acts as a particle |
| Which of these regions of the electromagnetic spectrum has the highest frequency? | Ultraviolet |
| What type of telescope can suffer from spherical aberration? | Reflector |
| Which type of telescope includes a flat secondary mirror? | Reflector |
| What is meant by active optics? | Shape of the mirror can be controlled |
| Which modern instrument spreads out the light according to wavelength? | Spectrograph |
| Which of the Great Observatories looks at the longest wavelength radiation? | Spitzer |
| Which telescope should be used to observe emission from extremely hot gases? | Chandra |
| Two atoms are considered different elements when one has... | A different number of protons |
| How can electrons become excited? | By collisions and absorbing a photon an rising to a higher energy level |
| Absorption spectra occur due to: | An electrons taking in the energy of photons and moving to a higher energy level |
| Why are the Balmer lines weak in cool stars? | The Hydrogen is mostly in the ground state |
| Which of the following spectral classes contain the hottest stars? | Class B stars |
| What is the second most common element the Sun? | Helium |
Created by:
Danice
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