Currently, two galaxies similar to the Milky Way and Andromeda (M31) galaxies are separated by about 2.70 million light-years and moving toward each other at about 115.00 km/s. Estimate how long it may take for the two to collide.
____ years
Compared to the speed of light, rank the following astronomical
phenomena from slowest to fastest speed.
Jet from an AGN
X-ray light
Fastest cosmic ray
Solar wind
A)
given
v = 115 km/s = 1.15*10^5 m/s
d = 2.7 millian light year
= 2.7*10^6*3*10^8*365*24*60*60 m
= 2.5544*10^22 m
time taken for them to meet,
t = distance between galaxies/relative speed of galaaxies
= d/(2*v)
= 2.5544*10^22/(2*1.15*10^5)
= 1.11*10^17 s
= 1.11*10^17/(365*24*60*60) year
= 3.52*10^9 years <<<<<<<<<<------------Answer
B)
X-ray light > Fastest cosmic ray > Solar wind > Jet from
an AGN
Currently, two galaxies similar to the Milky Way and Andromeda (M31) galaxies are separated by about...
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