travel through a vacuum at the speed of light. Other waves need a medium; sound waves need molecules that vibrate.
Answer:
or pure hydrogen
Explanation:
hope this helps you because this is the answer i have for you
Answer:
weaker has the heavier of an object
distance to the star Betelgeuse: 640 ly
As we know that

also we know that


So the distance of Betelgeuse = 640 ly

distance to the star VY Canis Majoris: 


distance to the galaxy Large Magellanic Cloud: 49976 pc


now we have


distance to Neptune at the farthest: 4.7 billion km

now the order of distance from least to greatest is as following
1. distance to Neptune at the farthest
2. distance of Betelgeuse
3. distance to the star VY Canis Majoris
4. distance to the galaxy Large Magellanic Cloud
Answer:
my bad i wish i could ansrew
Explanation:im only six