welcome to gareeb Scientist
today we will learn about the 20 new moons found around saturn
i understand i havent uploaded since a long time , but im working on a detailed video
wait for it , it will come soon
astronomers found 20 new moons around saturn
so Saturn now has 82 known moons .
jupiter was previously the king of moons with 79 known moons
now its saturn
this discovery was led by Scott Shepard from Carnegie institution of science , washington DC.
along with his colleagues David and Jan .
The subaru telescope in Hawaii was used for this discovery
most of the moons are around 5km in diameter
17 are retrograde
which means they are opposite the axis of rotation of saturn
3 are prograde , which means they are along the axis of rotation of saturn , same direcction
2 are relatively close to Saturn
17 are in between
the last one is very unique , its prograde and very outside
it might be one of the outermost moon we have discovered around saturn
all moons of saturn are generally divided into 3 groups
the innermost group is the inuit group .
the middle is the norse group '
the outermost one is the gallic group
the prograde moon may or  may not be put into the gallic group , not decided yet
it looks like a result of past collisions '
the moons are in certain groups because their orbital parameters are similar '
so it is theory that these 3 might have been collisions many years agoo
so the saturn moon system iis divided this way
the outermosst porgrade moon is very unique
because its not only far away but also in a prograde orbit .
we will know the details as this research progresses.
i got the onscreen question on twitter
Shepard sir had observed something similar in 2007 , but they coudnt prove it then .
he said with modern computation techniques they combined several years of data and concluded these are moons
as you can see on the screen the stars are static in the background but the moon is moving
we might be able to hunt even kilometer diameter moons with large telescopes
how small can be a moon , tell me
