the answer is "first".
penis
They collided with another galaxy
they see the past when they look up and see the galaxies. its looking back in time because light can take years to travel to earth and so its like their looking at the youth of the galaxy.
by using the distance from Earth to various galaxies and by calculating the ages of old, nearby stars.
cuz they are explorers
Scientists use a classification system called taxonomy to categorize plants and animals based on their shared characteristics. This system groups organisms into hierarchical categories like kingdom, phylum, class, order, family, genus, and species. By classifying organisms in this way, scientists can better understand their relationships, evolutionary history, and biological characteristics.
They (scientists) think there are hundreds of thousands of galaxies because the universe is limitless so there may be billions of galaxies!
to now how they know the animals that they already identified
the answer is "first".
Because they can see them.
Yes, because scientists have found hundreds and hundreds of galaxies already and scientists say that there are more galaxies out there that they haven't found!
skin color
penis
yes, we are one of the trillions and trillions of galaxies!
scientists use a tree of life to distinguish different individual organisms. or in other words to categorize them down to their species.
The Scientific Method is a great tool to use for research. It can help the scientists categorize and interpret their information with greater success.