Is there an exoplanet detection method that works better with detecting exoplanets that are at a large distance from their host star? a) none b) radial velocity method c) direct detection  d) transit method

Some astronomers argue that Jupiter and Saturn areunusual, while other astronomers argue that all solarsystems should contain one or two such giant planets.

What is an exoplanet? Group of answer choices A planet in our solar system beyond Pluto. Any planet with extra-terrestrial life. A planet in an extra-solar star system outside of our solar system. Objects in the solar system such as Pluto that were once considered planets but no longer are.

INVEST IGATION 3 1. Fill out this data table with information you have collected (from Handout B: Pluto) about the dwarf planet Pluto. Characteristics Unit Pluto Mass 1024 g 14.6 Volume 1024 Cm3 7 Density g/cm3 2.08 5,900.4 Distance from Sun 106 km 1,185 Radius km Crust Thickness km unknown Atmosphere Height km 60 km Axial Tilt degrees 122.5 Force of Gravity on a 1 kg test mass Length of Day hours

The mass of an average comet's nucleus is about 1.0 x 1014 kg. If the Oort cloud contains 2.0 x 101 comet nuclei, what is the mass of the cloud in units of Earth masses? (Note: Earth's mass is 5.97 x 1024 kg.) M. Compare that with Saturn's mass. (Note: Saturn's mass in units of Earth's mass is 95.2 M.) mass of the Oort cloud mass of Saturn

If there was a planet orbiting a first generation star, which planet in our solar system would it resemble most? Would it be likely for such a planet to have life?

2. The destructive "Tunguska Event" of 1908 seems to have been due to     an airburst by a modest-sized asteroid     a direct impact on land by a large asteroid     an ocean impact by a comet     a nearby supernova explosion Astronomers have determined that the probability of a significant asteroid impact on Earth during your lifetime is about the same as the probabilty that you'll win the lottery.  True  False

If you stood on Earth during its formation, during which it captured about 1.6 ✕ 1011 particles per second, and watched a region covering 170 m2, how many impacts would you expect to see in an hour? (Notes: The surface area of a sphere is 4?r2. Hint: Assume that Earth had its current radius of 6,378 km.)

The Solar Nebula model introduces the concept of ‘frost line’. Where are asteroids and comets found with respect to this frost line? How is their location connected to their composition?

The planet Uranus was discovered in 1781, and Neptune, the next planet outward from the Sun, was discovered in 1846. Imagine you're an astronomer in 1846, and you start wondering if there's another planet out beyond Neptune. You decide to try and discover its existence using the same method that was used for Neptune. How will you do this? Group of answer choices You'll recruit a large number of astronomers to use their telescopes to carefully scan the sky in directions that are far from the ecliptic. The regions around the north and south celestial poles will probably be the best "hunting grounds" for the new planet. You'll examine Uranus and Neptune very carefully, on every clear night, for several years, to see if you can find any evidence that sunlight has been reflected off of the `new' planet, then off of Uranus or Neptune, before arriving on Earth. On rare occasions when Neptune passes in front of the Sun, as seen from Earth, you'll look carefully at the Sun (with a safe…