One significant effect would be that long range radio communication by shortwave would be impossible.
In the exosphere, you would see a very thin scattering of gas molecules, such as hydrogen and helium, at extremely low densities. There are very few particles present, and the exosphere is where the Earth's atmosphere gradually transitions into space.
Exosphere
If constellations disappeared, stargazing and navigation by the stars would be more challenging. However, the celestial objects themselves would still exist. Constellations are simply patterns that we've formed by connecting stars in the sky, so their disappearance would not affect the stars themselves.
No. The exosphere is the uppermost part of Earth's atmosphere. Mars is well beyond the exosphere. It is a planet in its own right just as Earth is.
What would happen next if sagebrush is disappeared frrom a desert?
You would die.
You would die.
if the oxygen
Everything would die
There would be no bees to pollenate the flowers.
This cannot possibly happen, so asking what would happen if it did happen is an exercise in stupidity.
life would follow
They're populatioon would grow rapidly
know one knows. because we would all be frozen.
they may not have food
Flowers and plants would not be pollenated and they would die.