explorer? you probably mean astronomer.
Galaxies are vast collections of stars. So I guess you could say that a big group of stars forms a galaxy. Our galaxy has many big clusters of stars within it, so not all star clusters are galaxies. If you have a cluster of several million or billion (or trillion) stars surrounded by a lot of empty space, that is probably a galaxy.
About 1925.
Interacting galaxies are the first type of peculiar galaxies.
Christopher Columbus was the first explorer
The first European explorer was Marco Polo.
Who the first explorer of Maine was is a debated topic. Some believe that John Cabot was the first explorer while others claim it was George Popham.
the answer is "first".
Notice is stressed on the first syllable.
The first explorer in Connecticut was Aderian Block. He founded it for the Dutch in 1614.
who was the first post explorer settlement in kentucky
Ferdinand Magellan was the first explorer to reach Asia by ship. He was a Portuguese explorer who lived from 1480 to 1521 CE.
Their look. If it is about a girl, then I notice their face and hair first!