In what ways do observed extrasolar planetary systems differ from our own solar system?
How do extrasolar planetary systems differ from the Solar System? — They are never more than three-planet systems. They are almost always comparable in mass to Jupiter. They have highly eccentric orbits which bring them very close (much less than 1 A.U.) to their parent star.
How do extrasolar planets compare with planets in our solar system quizlet?
Orbits of some extrasolar planets are much more elongated (have a greater eccentricity) than those in our solar system. Some extrasolar planets have highly elliptical orbits. Planets show huge diversity in size and density. Some massive planets, called hot Jupiters, orbit very close to their stars.
Why are most extrasolar planetary systems so different than ours?
Why are most extrasolar planetary systems so different than ours? It is easier to detect planets that are massive and close to their stars, and harder to detect systems like our own.
What are the two main differences between extrasolar planetary systems?
What are the two main differences between extrasolar planetary systems discovered to date and our Solar System? the planet's mass and orbital distance.
Why are extrasolar planets difficult?
Exoplanets are very hard to see directly with telescopes. They are hidden by the bright glare of the stars they orbit. So, astronomers use other ways to detect and study these distant planets. They search for exoplanets by looking at the effects these planets have on the stars they orbit.
How do we know that extrasolar planets are orbiting other stars?
Most exoplanets are found through indirect methods: measuring the dimming of a star that happens to have a planet pass in front of it, called the transit method, or monitoring the spectrum of a star for the tell-tale signs of a planet pulling on its star and causing its light to subtly Doppler shift.
What is an extrasolar planet quizlet?
What is an extrasolar planet? A planet that orbits a star that is not our own Sun. A planet that is considered an "extra," in that it was not needed for the formation of its solar system.
What is the main reason it is so challenging to detect extrasolar planets quizlet?
Why is it so difficult to take pictures of extrasolar planets? Their light is overwhelmed by the light from their star. Suppose you are using the Doppler technique to look for planets around another star.
What is an extrasolar planet and why is direct detection of them so difficult?
Picture this – direct imaging of exoplanets It is extremely difficult to directly image exoplanets, as the light from the star overwhelms the planet – by more than a factor of a million. Even when the light of the star is blocked, most planets are too faint or too close to the star to be seen.
How do astronomers know there are planets around other stars — and what can they learn about them?
The vast majority of planets around other stars have been found through the transit method so far. This technique involves monitoring the amount of light that a star gives off over time, and looking for dips in brightness that may indicate an orbiting planet passing in front of the star.
Do exoplanets orbit the same star as Earth?
Planets that orbit around other stars are called exoplanets. All of the planets in our solar system orbit around the Sun. Planets that orbit around other stars are called exoplanets. Exoplanets are very hard to see directly with telescopes.
What was so surprising about the first extrasolar planets discovered quizlet?
What was so surprising about the first extrasolar planets discovered? They were Jupiter-like planets orbiting very close to their stars. A star is seen to have two transiting planets. Planet 1 transits every 3 months, and Planet 2 transits every 15 months.
What was so surprising about the first extrasolar planets that they forced A change in our theory of planet formation?
What was so surprising about the first extrasolar planets that they forced a change in our theory of planet formation? They were massive like Jupiter, but very close to their host star.
Why are extrasolar planets so difficult to detect?
Because exoplanets exist outside our solar system, orbiting other stars, they can be hard to capture with a telescope. In fact, even Neptune, in our own solar system, is a blurry blue ball when viewed form Earth's orbit. Because of this, it can be hard to find exoplanets.
Why are so many of the extrasolar planets that have been detected thus far in orbits so close to their stars?
While the Doppler technique is most widely used for detecting extrasolar planets, it is best suited to look for very massive planets orbiting close to their parent star. This is because the parent star will wiggle more with a large planet nearby, thereby creating a larger and more easily detectable spectral shift.
What is the main reason the direct detection method tends to find exoplanets that are far away from their stars?
With this method, it is easier to detect massive planets close to their stars as these factors increase the star's motion. Unlike the radial velocity method, it does not require an accurate spectrum of a star, and therefore can be used more easily to find planets around fast-rotating stars and more distant stars.
How do astronomers detect extrasolar planets?
Bottom line: The most popular methods of discovering exoplanets are the transit method and the wobble method, also know as radial velocity. A few exoplanets have been discovered by direct imaging and microlensing.
How do we know that extrasolar planets are orbiting other stars quizlet?
How do we know that extrasolar planets are orbiting other stars? They have high mass and orbit close to their stars.
What was so surprising about the first extrasolar planets that they forced a change in our theory of planet formation?
What was so surprising about the first extrasolar planets that they forced a change in our theory of planet formation? They were massive like Jupiter, but very close to their host star.
What was surprising about the first extrasolar planets discovered?
What was so surprising about the first extrasolar planets discovered? They were Jupiter-like planets orbiting very close to their stars. A star is seen to have two transiting planets. Planet 1 transits every 3 months, and Planet 2 transits every 15 months.
Why is it so difficult for astronomers to take a picture of an extrasolar planet?
Extrasolar planets move too quickly in their orbits for stable imaging. E. Planets are fainter than their stars and cannot be seen in the glare of starlight.
Which of the following methods has led to the most discoveries of extrasolar planet candidates?
Which of the following methods has led to the most discoveries of extrasolar planet candidates? measuring the time it takes for the star's line-of-sight velocity to cycle from peak to peak, and using Newton's version of Kepler's Third law.
What is the biggest problem in detecting exoplanets?
“The fundamental problem is that exoplanets are almost always too small and too dim to look at directly,” she adds. “The only ways we can discover them are indirect – we have to look at how they influence the star that they're orbiting around.
Why are extrasolar planets hard to detect directly quizlet?
Terms in this set (29) why are extrasolar planets hard o detect directly? 1. planets are extremely tiny compared to the vast distances between stars.
What is the main reason it is so challenging to detect extrasolar planets?
Because planets are much fainter than the stars they orbit, extrasolar planets are extremely difficult to detect directly.
What method has detected the most extrasolar planets so far?
Most known exoplanets have been discovered using the transit method. A transit occurs when a planet passes between a star and its observer. Transits within our solar system can be observed from Earth when Venus or Mercury travel between us and the Sun.
How can the exoplanets be detected discuss the various methods?
Exoplanets have become an important area of astrophysics in the last two decades. This paper reviews five different methods to detect exoplanets, including direct imaging, astrometry, radial velocity, transit event observation, and microlensing.
Do exoplanets orbit our Sun?
The Short Answer: All of the planets in our solar system orbit around the Sun. Planets that orbit around other stars are called exoplanets. All of the planets in our solar system orbit around the Sun. Planets that orbit around other stars are called exoplanets.
What are the general characteristics of the extrasolar planets discovered so far quizlet?
We see a star's light dim as a planet passes in front of the star AND detect alternating Doppler shifts in the spectra of some stars. What are the general characteristics of the extrasolar planets discovered so far? They have high mass and orbit close to their stars.
How do astronomers find exoplanets quizlet?
Astronomers are detecting some exoplanets and measuring their sizes as they transit in front of their star, dimming its light. Exoplanets have also been detected by microlensing of background stars. Exoplanets have also been detected by microlensing of background stars.