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: about 100 km[kilometers] thick
Explanation:
The shape is connected in parallel so;
5.1) Ans;
5.2) Ans;
I hope I helped you^_^
Density is defined as (mass) per unit (volume). So in order to calculate
the density of a glob of some substance, you pretty much have to measure
its mass and its volume.
You need to use Planck's law:
E = h·υ = (h·c)/λ
Without making all the calculations, a fraction is bigger than another when the denominator is smaller. Therefore you need to find the smallest wavelength (λ) which is 450nm.
You could also be helped by colors: in order of decreasing energy, you have blue - green - yellow - red.
In any case, the correct answer is a).
