Answer:
DONT POST PICS OF YOURSELF ON THIS!!!!!!!!!!!!! WHAT IF I WAS A CREEPY OLD MAN? STAY SAFE ONLINE!!!!!!!!!!!!!
Explanation:
You could get sick by breathing throw your mouth and you have a less chance of getting sick by breathing throw your nose.
There's no such thing as "stationary in space". But if the distance
between the Earth and some stars is not changing, then (A) w<span>avelengths
measured here would match the actual wavelengths emitted from these
stars. </span><span>
</span><span>If a star is moving toward us in space, then (A) Wavelengths measured
would be shorter than the actual wavelengths emitted from that star.
</span>In order to decide what's actually happening, and how that star is moving,
the trick is: How do we know the actual wavelengths the star emitted ?
