Explain how the spectrum arises.
12) The Sun is primarily composed of hydrogen and helium, with traces of other elements. Its visible surface, the photosphere, is a dense and nearly opaque gas at a temp of 6000 K. Describe the spectrum that originates at this surface, due to the physical state of the material. Explain how the spectrum arises.
Why is the North Star called the North Star?
Why is the North Star called the North Star? Include where in the sky it is when viewed from the North Pole, your location, and the Equator. Also include what is meant by circumpolar stars?
How do you explain planet retrograde motion by the Earth-center hypothesis? By the Sun-center hypothesis?
A comparison of the science of Earth as compared with the other planets in our solar system.
A comparison of the science of Earth as compared with the other planets in our solar system. a. Much is known about planet Earth, as it is our home planet. It is therefore an ideal planet for comparative planetology. Briefly describe the properties of our planet and explain them. Include the qualities of the earth ...continues
Define the science of astronomy, and compare it with the pseudo-science of astrology.
Define the science of astronomy, and compare it with the pseudo-science of astrology.
Compare the surfaces of the Moon and Mercury. How are they similar and why?
Compare the surfaces of the Moon and Mercury. How are they similar and why?
Is Venus an evening or morning star?
Is Venus an evening or morning star?
Explain how the age of rocks can be determined by radioactivity.
a. Explain how the age of rocks can be determined by radioactivity. Give an example. b. How can scientists determine the internal structure of the Earth, if the depth of the deepest well is only a tiny fraction of the earth’s diameter? c. Impact cratering, volcanism, tectonics, and erosion are the four major ...continues
d. If the ages of the Earth and Moon are nearly identical, as believed, why are most rocks found on the Moon so much older than Earth rocks? e. What do observations of the Moon suggest about how it was formed? f. Which is hotter, Mercury or Venus? Why?
g. Venus and Earth are about the same size and mass, yet carbon dioxide is a major constituent of the atmosphere of Venus, while oxygen is much more abundant in the Earth’s atmosphere. Explain why the atmospheres are so different. h. Explain why there are two general families of planets, rocky terrestrial and gaseo ...continues
