Multiple Choice
Which of the following is not evidence of the existence of an interstellar medium?
A) extinction
B) narrow calcium lines in the spectra of O and B stars
C) reddening
D) dark clouds
E) molecular bands in the spectra of cool stars
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q1: HI clouds can be observed using 21-cm
Q3: The presence of forbidden lines in the
Q5: Which of the following properties are not
Q6: HII regions are found near stars cooler
Q7: _ are cool,with temperatures of 50 to
Q8: _ is(are)believed to make up 50 percent
Q9: HII emission nebula regions are found around
Q9: Stars are born in<br>A)reflection nebulae.<br>B)dense molecular clouds.<br>C)HII
Q78: Bok globules are small, dark fragments of
Q87: Absorption lines due to interstellar gas<br>A) are