The M51 is better known as the whirlpool galaxy.
Yes. M51 (Messier 51) aka Whirlpool galaxy are the same thing.
The Whirlpool Galaxy (aka M51) has a companion galaxy called NGC 5195, which has been passing behind (from our view) M51 for hundreds of millions of years.
No telescope has been found on any galaxy
201,600.
within or on the edges of the spiral arms of the galaxy
within or on the edges of the spiral arms of the galaxy
The Whirlpool Galaxy (or M51), was discovered in 1774 by Charles Messier.
The Sunflower Galaxy (M63 galaxy) and the Whirlpool Galaxy (M51 galaxy).
within or on the edges of the spiral arms.
The Whirlpool Galaxy or M51 can be found in the constellation Canes Venatici. It is approximately 23 million light years from us.See related link for a star map.
Here's one: White dwarf star. Here's another: Whirlpool galaxy (M51).
We can't even see individual STARS in other galaxies, much less PLANETS. We have no idea how many stars are there.