6 Which of the following methods has led to the most discoveries of massive planet A B с D Detecting the shift of the star's position against the sky due to the planet's Detecting the starlight reflected off the planet Detecting a planet ejected from a binary star system Detecting the infrared light emitted by the planet
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- 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 FalseThe microlensing technique for detecting extrasolar planets involves obtaining OBSERVING brightness measurements of a star and identifying brief, periodic dips in its brightness infrared images of a planet with the light from its host star blocked out a spectrum of a star and identifying periodic wavelength shifts in its features brightness measurements of a star and identifying a brief magnification in its brightness a spectrum of an extrasolar planet and identifying elements and compounds present in its atmosphere10
- Consider a cool Jupiter with a temperature of 1183 K and a hot Jupiter with a temperature of 3180 K are orbiting the star Vega what is the ratio of the hot Jupiters power per square meter to a cool jupiters power per square meterWhat is the time taken by a planet to sweep an area of 2 million square km if the time taken by the same planet to cover an area of 1 million square km is 36 hours? 18 hours 36 hours 72 hours 144 hoursPlease answer the question and subquestions completely! This is one whole question which has subquestions! According to the official Bartleby guidelines, each question can have up to two subquestions! Thank you! 1) The mass of Planet W is 1/100 that of Earth and its radius is 1/4 that of Earth. If the weight of an object is 600 N on Earth, what would it weigh on Planet W? 24 N 48 N 96 N 192 N 600 N A) The weight of an object at the surface of Earth is 90 N. What is its weight at a distance 2R from the surface of Earth? 10 N 30 N 90 N 270 N 810 N B) A 9.0 x 10 3 kg satellite orbits the Earth at the distance of 2.56 x 10 7 m from Earth’s surface. What is its period? 1.1 x 10 4 s 4.1 x 10 4 s 5.7 x 10 4 s 1.5 x 10 5 s
- 1A heavenly body revolves around a massive star in a highly elliptical orbit. Ignoring mass loss of the heavenly body when it comes too close to the star, the angular momentum over the orbit is _____________ a) Zero b) Increasing c) Decreasing d) ConstantThe brightest nebula in the sky is __________ a) Orion b) Pleiades c) Cepheid d) Trifid