Jealous of her sister, she caused a solar eclipse which transformed her into Nightmare Moon. Celestia then reluctantly harnessed the power of the Elements of Harmony and banished her to the moon, taking responsibility for both sun and moon and maintaining harmony in Equestria.
Because of the heat wave coming from the sun, Princess Celestia is absorbing the sun's rays, making her become more and more powerful than usual. The sun's super-hot rays are also making her evil. The heat wave temperature eventually increases, causing Princess Celestia to transform.
Her cutie mark depicts a sun with a black sphere, as opposed to the real Celestia's having a yellow sphere. Unlike the Celestia, who is kind, intelligent, wise, and mature, Evil Celestia is cruel and quite childish, taking every chance to taunt her enemies and treated her fight with Celestia as "playing".
One day, Luna finally became fed up with Celestia's success. Not only did she refuse to lower the moon, but also challenged Celestia for the sole rulership of Equestria. At that moment, the darkness in Luna's heart manifested and consumed her, transforming her into Nightmare Moon, a black mare of pure darkness.
Daybreaker. The episode A Royal Problem reveals a potential evil alter-ego for Celestia named Daybreaker, self-described as "the better, prettier, and more powerful version" of Celestia. This version of Celestia is considerably arrogant, power-hungry, and destructive.
A thousand years before the events of the series, Celestia's younger sister, Princess Luna, was jealous of her because ponies were diurnal and afraid of the night.
She also stated that when Nightmare Moon was defeated, Luna was reborn with very low magic levels. In newer , her mane was then magical and wavy again because her good powers had been restored. Princess Luna in Luna Eclipsed. A pony based on Luna's design is used in Sweet and Elite.
Nightmare Moon is the corrupted form of Princess Luna.
Lord Tirek (also simply known as Tirek) is a power-hungry centaur with the power to drain the magic and abilities out of other creatures and one of the main antagonists of My Little Pony: Friendship is Magic.
Celestia and Luna have it because it takes massive amounts of power to raise the sun and moon. Cadence did get a flowy mane once, in the last scene of A Canterlot Wedding (when she and Shining Armor banish all the changelings). It's only for a second, and shining armor has it too.
According to Lord Tirek in The Beginning of the End - Part 1, the land that would eventually become Equestria was originally a collection of farms and pastures until Grogar declared himself emperor of everything.
Princess Luna is Princess Celestia's younger sister who serves as co-ruler of Equestria and uses her magic to raise the moon and safeguards her subjects' dreams during nighttime.
The answer to this question is no. There are three types of alicorns, neither living forever, but some living longer. Born alicorns such as Luna and Celestia live a longer life than other normal ponies, by aging one year every 50 or so years, and maturing much faster than normal kinds of ponies.
When they say Princesses Celestia and Luna raise the sun and moon, respectively, what they really mean is that the royal sisters use their Alicorn magic to rotate the ponies' home planet (called Pony World) on it's axis. Pony World's moon is called Pony Moon, of course.
Her bitterness "transformed her into a wicked mare of darkness: Nightmare Moon." The elder sister reluctantly harnessed the power of the Elements of Harmony and "banished her permanently in the moon," taking responsibility for both sun and moon, maintaining harmony in Equestria.
Prince Blueblood is a royal male unicorn pony who resides in Canterlot. He is the distant nephew of Princess Celestia and Princess Luna and the cousin of Princess Cadance.
Nightmare Moon is speculated to be some sort of demon that needs invitation into a body, indicating that Princess Luna, in her jealousy, gave in to her, but might not have known what will happen exactly.
Luna was the sister of Sol (the male sun god) and of Aurora (the female goddess of dawn). She was one of the consorts of Jupiter, the god of sky, thunder and king of the Roman gods; their offspring included Pardeia, Herse and Nemeia. In addition to Jupiter, Luna had a second mythical consort named Endymion.
Queen Celestia is an Alicorn pony, the ruler of South Equestria alongside her husband King Hepheus with whom she has a daughter called Gleaming Shield.
Izzy is Luna's Daughter
Long ago in an Equestria not quite like the one Izzy currently inhabits, there was a socially awkward moon princess who was super lonely... again Like, to the point of desperation. This went on for around 50 or so years until an industrious pony software engineer invented the first dating app.
Princess Luna is an alicorn princess, meaning she is a pony with Pegasus wings and a unicorn horn.
One thousand years prior to the series setting, Luna became jealous of Celestia when the ponies shunned her nights but enjoyed the day. She eventually transformed into the evil wicked mare of Darkness and Destruction, known as Nightmare Moon as a result of this jealousy, and was imprisoned in the moon.
In the IDW comics story arc Reflections, Princess Celestia is in love with the King Sombra of an alternate dimension.
Princess Luna is Celestia's younger sister and they seem to be very close. As they are the ones who raise the Sun and the Moon, they rule over Equestria.