Why is it so difficult for astronomers to take a picture of an extrasolar planet quizlet?
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.
What is the chief difficulty in attempting to detect planets quizlet?
What is the chief difficulty in attempting to detect planets around other stars? Planets do not emit visible light, and they are typically at least a billion times fainter than their host stars.
Why don’t we see transit events for most stars that have been found to have planets?
Why don't we see transit events for most stars that have been found to have planets? Most of the planets orbit the star without ever getting directly in between Earth and the star. Suppose you monitor a large number (many thousands) of stars over a period of 3 years, searching for planets through the transit method.
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.
Why is it so difficult to make A direct image of A planet around another star?
Answer: Compared to how far stars are from us, their planets orbits are very small. Further, planets only reflect light (or weakly emit infrared radiation) and are therefore much (billions) of times fainter than the star. It is very difficult to make an image of such a faint object so close to such a bright object.
Why is it so difficult to image an Earth sized planet directly quizlet?
Why is it so difficult to image an earth sized planet directly? In order to better see a planet we need to move it further from the star in the image.
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.
Why is the transit method difficult?
The main difficulty with the transit-photometry method is that in order for the photometric effect to be measured, a transit must occur. Not all planets orbiting other stars transit their stars as seen from Earth; a distant planet must pass directly between its star and Earth.
Why is it difficult to see straight through to the center of the Milky Way at optical wavelengths?
Optical. Optical observations of the Milky Way are probably the most familiar. One challenge, though, is that optical light is absorbed quickly by interstellar gas and dust, so we can't see as far as we can in some other wavelengths.
What is a disadvantage of the transit method?
Disadvantages. The main difficulty with the transit-photometry method is that in order for the photometric effect to be measured, a transit must occur. Not all planets orbiting other stars transit their stars as seen from Earth; a distant planet must pass directly between its star and Earth.
Why is it so difficult to make a direct image of a planet around another star?
Answer: Compared to how far stars are from us, their planets orbits are very small. Further, planets only reflect light (or weakly emit infrared radiation) and are therefore much (billions) of times fainter than the star. It is very difficult to make an image of such a faint object so close to such a bright object.
Which of the following is a reason that astronomers have not found giant planets with the orbit of Neptune around other stars?
Which of the following is a reason that astronomers have not found many giant planets with the orbit of Neptune around other stars? Neptune takes 165 years to go around the Sun; getting information about just one cycle of such a planet's orbit around another star would take astronomers 165 years.
Is it possible to directly image a planet in a telescope?
Direct imaging of exoplanets is extremely difficult and, in most cases, impossible. Being small and dim, planets are easily lost in the brilliant glare of the stars they orbit. Nevertheless, even with existing telescope technology, there are special circumstances in which a planet can be directly observed.
Which of the following is a major reason why it’s difficult to obtain direct images of extrasolar planets group answer choices?
Which of the following is a major reason why it so difficult to obtain direct images of extrasolar planets? The light of the planets is overwhelmed by the light from their star.
Which one makes it possible to learn of the existence of extrasolar planets without seeing the planets themselves?
What makes it possible to learn of the existence of extrasolar planets without seeing the planets themselves? Planets exert gravitational tugs on their stars that cause stars to orbit around the center of mass of their planetary systems.
Why is direct detection so difficult?
Compared to other methods, Direct Imaging is rather difficult because of the obscuring effect light from a star has. In other words, it is very difficult to detect the light being reflected from a planet's atmosphere when its parent star is so much brighter.
What is the major difficulty in directly detecting extrasolar planets?
The planet has to be on the larger size usually and close, otherwise detecting a planet blocking enough light from Earth is difficult as it is not that noticable.
What is an important difficulty with the transit method of detecting exoplanets?
The main difficulty with the transit-photometry method is that in order for the photometric effect to be measured, a transit must occur. Not all planets orbiting other stars transit their stars as seen from Earth; a distant planet must pass directly between its star and Earth.
What is direct imaging of exoplanets?
Direct imaging of planets refers to the effort to detect and study exoplanets from the light emitted or scattered by the planets themselves, as opposed to inferring the existence and properties of planets from their effects on the images or spectra of the stars they orbit.
Why can’t we take a picture of the Milky Way galaxy from the outside?
It takes 250 million years for our Sun and the solar system to go all the way around the center of the Milky Way. We can only take pictures of the Milky Way from inside the galaxy, which means we don't have an image of the Milky Way as a whole.
Why is it so difficult to study the center of our galaxy quizlet?
Why is it so difficult to study the center of our galaxy? Interstellar dust blocks almost all light before it reaches Earth.
Why is it difficult to discover long period exoplanets using the transit method?
The main difficulty with the transit-photometry method is that in order for the photometric effect to be measured, a transit must occur. Not all planets orbiting other stars transit their stars as seen from Earth; a distant planet must pass directly between its star and Earth.
Which of the following is a reason that astronomers have not found giant planets with the orbit of Neptune quizlet?
Which of the following is a reason that astronomers have not found many giant planets with the orbit of Neptune around other stars? Neptune takes 165 years to go around the Sun; getting information about just one cycle of such a planet's orbit around another star would take astronomers 165 years.
Why are astronomers today not able to say what the surface of Titan looks like?
— Voyager 1 did not see Titan's surface because it is obscured by a thick, uniform layer of haze that envelops the moon completely.
Why is direct imaging of exoplanets difficult?
Compared to other methods, Direct Imaging is rather difficult because of the obscuring effect light from a star has. In other words, it is very difficult to detect the light being reflected from a planet's atmosphere when its parent star is so much brighter.
Which of the following is a major reason why it so difficult to obtain direct images?
It can detect planets through the astrometric method. Which of the following is a major reason why it so difficult to obtain direct images of extrasolar planets? The light of the planets is overwhelmed by the light from their star.
Is it possible to photograph a planet orbiting around another star?
Is it easy to photograph of a planet orbiting around another star? No, because the brightness of the star would overwhelm the planet. in infrared light. of the star the planet is orbiting.
Why is detecting exoplanets so difficult?
But exoplanets, which orbit distant stars, are more difficult to directly observe, because they are much farther away and close to their extremely bright stars. Instead, astronomers often detect exoplanets indirectly, through the effect they have on their host star.
Why is it hard to study exoplanets?
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.
What are the strengths and limitations of the transit method?
The transit method has the advantage of yielding a planet's size. Its disadvantage is that few planets have the necessary orbital alignment to even be detectable. What kinds of planets are easiest to detect with each method? Both techniques are most sensitive to large planets close to their stars.