Apollo gets angry that Orion is hunting with his sister Artemis and later tricks her into killing Orion. Orion is then hung in the stars.
No. Artemis does not appear in the myth about Medusa.
Some myths claim so.
Leto is the Titan goddess of motherhood and protector of children due to the myths of her own difficult birth of Artemis and Apollo.
Asteria, who turned into the island Delos (where Apollo was born) - is the sister of Leto, the mother of Artemis and Apollo. Rarer myths say that Artemis is the daughter of Demeter, making her aunts both Hera and Hestia. In any case, from Zeus her father Demeter, Hera, and Hestia are her aunts.
There is no set sign for Artemis, it varies with symbols and myths.
These may be better determined by the individual and their knowledge of the myths referring to Artemis.
In the modern day, stories are still being told and written which feature Artemis; regardless, we do not have a complete record of all the myths of the Greeks.
Artemis the Greek goddess was born in the myths of ancient Greece. There is no known date.
It depends on the myth. Artemis' myths were largely relating to her worship and religion.
No, Leto was Artemis's true mother, although in some myths Leto nursed Artemis and her mother was Demeter.
Yes, there are myths were Leto the mother of Artemis and Apollo traveled and hunted with them. Apollo and Artemis also were defenders of Leto.
Below is a link to some accounts.
They are related in the myths we know today.
Apollo gets angry that Orion is hunting with his sister Artemis and later tricks her into killing Orion. Orion is then hung in the stars.
There aren't any myths to tell us what Artemis dreamed of, so no one can say for sure.
Artemis was both immortal and ageless in the Greek myths so no one can say.