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Test:5th Grade Science
| 1. | NASA gives background information on the brightness of stars, "To find out the true brightness of a star; scientists need to know how far it is. Although there are some very clever ways of gauging the distances to stars, they generally work well only for stars that are in the Sun's neighborhood of the Milky Way galaxy. The more distant stars are just so fantastically far from us that measuring their distances accurately is too difficult. Making it still harder to know how bright a star is, there is a kind of patchy fog between the stars - space is not truly empty. Although it is not the same as the fog on Earth, gas and dust in space can dim the light of stars. Without a good way to know how much of this interstellar fog is blocking the light, there is no reliable way to discover the true brightness of a star." Which piece of text evidence supports the claim that it is possible to measure the actual brightness of stars? Source:https://spaceplace.nasa.gov/review/dr-marc-space/brightest-star.html |
"To find out the true brightness of a star; scientists need to know how far it is."
"The more distant stars are just so fantastically far from us that measuring their distances accurately is too difficult."
"Without a good way to know how much of this interstellar fog is blocking the light, there is no reliable way to discover the true brightness of a star."
None of the answer choices are correct
