Neutral hydrogen may be detected between the stars because it ...

[a0266361136]

Neutral hydrogen may be detected between the stars because it emits ________.
 
  Fill in the blank(s) with correct word

Question 2

The atmospheric pressure on Venus:
 
  A) shows an extreme change with the seasons.
  B) is much lower than on Earth.
  C) is about the same as on Mercury.
  D) is much higher than on Earth.
  E) causes variations in surface temperature.

[coyin]

Answer to Question 1

21 cm radiation

Answer to Question 2

D

[a0266361136]

Wow, this really help

[mammy1697]

Thanks for the timely response, appreciate it