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iogann1982 [59]
2 years ago
13

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 are necessary for this program to detect an extrasolar planet around one of these stars?
1. You must be able to precisely measure variations in the planet's brightness with time.
2.You must be able to precisely measure variations in the star's brightness with time.
3. As seen from Earth, the planet's orbit must be nearly face-on (perpendicular to our line-of-sight).
4. The planet must have an orbital period of more than about 3 years.
5. As seen from Earth, the planet's orbit must be seen nearly edge–on (in the plane of our line-of-sight).
6. You must repeatedly obtain spectra of the star that the planet orbits.
7. The planet must have an orbital period of less than about 1 year.
8. You must repeatedly obtain spectra of the planet itself.
Social Studies
1 answer:
Musya8 [376]2 years ago
8 0

Answer:

5, 2, 7

Explanation:

-As seen from Earth, the planet's orbit must be nearly face-on (perpendicular our line-of-sight).

-You must be able to precisely measure variations in the star's brightness with time.

-The planet must have an orbital period of less than about 1 year.

Cheers

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Tamiku [17]

Chief joseph mention "general howard" in the first sentence of his speech because that is to whom he is surrendering.

<h3>Why does chief joseph mention "general Howard" in the first sentence in his speech?</h3>
  • Chief Joseph (1840–1904) led a number of Nez Perce bands that were compelled to leave their Wallowa Valley (Oregon) home in 1877 and relocate to a smaller reserve in Idaho, along with Chief Looking Glass and Chief White Bird.
  • However, Chief Joseph assisted a small number of Nez peoples in fleeing to the Canadian border when the U.S. Army, led by General Oliver O.
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Hence, that is why Chief joseph mentions "general Howard" in the first sentence of his speech because that is to whom he is surrendering.

To learn more about Chief Joseph refer to:

brainly.com/question/2582449

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