A star cluster at a great distance from the Sun appears to be fainter than a similar star cluster at a closer distance.Part of this is the expected result from the inverse square law,but the distant cluster will also appear fainter than expected by distance alone because:
A) the photons of light become "tired" and appear less bright as they travel.
B) the cosmological redshift has moved some of the light into the infrared spectral region.
C) star clusters are systematically smaller and hence less bright the farther they are from the galactic center and hence from the Sun.
D) light is scattered and absorbed by interstellar dust and gas between distant clusters and Earth.
Correct Answer:
Verified
Q7: The Pleiades cluster consists of a number
Q8: Which method has NOT yet been used
Q8: The light from a distant cloud of
Q9: Most interstellar matter is too cold to
Q10: What is the SECOND most abundant element
Q13: The light from a distant cloud of
Q14: How much of the visible mass of
Q15: The interstellar medium,as usually defined,contains all of
Q17: Most interstellar matter is too cold to
Q17: To detect MOST interstellar material requires:
A) optical
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents