University:
Eastern Kentucky University
Course:
AST 135 | Introductory Astronomy
Academic year:

2022
Views:

402

Pages:

1
Author:

Alexa Livingston

Suppose there were no solar wind. How would the appearance of a comet in our inner solar system be different? It would only have one tail instead of two Suppose we discover a new comet on an orbit that brings it closer to the Sun than Mercury every 125 years. What can we conclude? It has been on its current orbit for only a very short time compared to the age of our solar system. When we see a meteor shower, it means that _________. Earth is crossing the orbit of a comet Why won't Pluto collide with Neptune? Pluto orbits the sun exactly twice for every 3 Neptune orbits What is Pluto's moon Charon thought to have in common with our own Moon? It probably formed as the result of a giant impact Which of the following is a real piece of evidence pointing to recent geological activity on Pluto? Surface regions that suggest glacial movement of frozen ices of nitrogen and methane. Which of the following is NOT a piece of evidence supporting the idea that an impact caused the mass extinction that occurred 65 million years ago? Dinosaur bones contain rocks from the impact Which of the following best describes why scientists seek to identify even very small asteroids that could potentially hit Earth? To try to prevent an impact on a town or city Suppose that large jovian planets had never formed in our solar system. Which of the following would most likely be true? Neither the asteroid belt nor Oort Cloud would exist From the viewpoint of an alien astronomer, how does Jupiter affect observations of our Sun? It causes the Sun to move in a small ellipse with a 12 year orbital period Suppose you are using the Doppler method to look for planets around another star. What must you do? Compare many spectra of the star taken over a period of many months or years. In general, which type of planet would you expect to cause the largest Doppler shift in the spectrum of its star? A massive planet that is close to its star Suppose a planet is discovered by the Doppler method and is then discovered to have transits. In that case, we can determine all the following about the planet except ______________. Its rotation period The transit method allows us in principle to find planets around __________. Only a small fraction of stars that have planets You observe a star very similar to our own Sun in size and mass. This star moves very slightly back and forth in the sky once every 4 months, and you attribute this motion to the effect of an orbiting planet. What can you conclude about the orbiting planet? The planet must be closer to the star than Earth is to the Sun. Which of the following will allow you to learn something about a transiting planet's atmospheric composition? Compare spectra obtained during and before an eclipse.

Suppose There Were No Solar Wind

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