Question

astronauts on the moon can not hear each other directly...​

Answer 1

$\huge\frak\blue{AnsweR}$

$\normalsize\bf\red{ᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗᚗ}$

Astronauts on the moon can not hear each other directly because sound needs air to travel, but in moon, there is no air,

so they can not hear each other directly.

$\normalsize\bf\red{▬▭▬▭▬▭▬▭▬▭▬▭▬▭▬▭▬▭▬}$

Answer 2

Explanation:

$\huge\mathcal\colorbox{cyan}{{\color{white}{AŋʂᏯɛཞ♡࿐}}}$

Sound requires medium to travel. The absence of atmosphere on the Moon makes it medium less. Thus, the astronauts on the Moon cannot hear each other directly because of absence of the medium.