Canst thou bind the sweet influences of Pleiades,
Or loose the bands of Orion?
Canst thou bring forth the Mazzaroth in his season?
Or canst thou guide Arcturus with his sons?

Orion is depicted as a hunter in Greek mythology. One of the earliest appearance of Orion in Western civilisation is evident in Homer’s Iliad and Odyssey, which is likely written between late 8th and early 7th century BCE. The exact time of his origin is unknown.

Look up into the clear night sky, and you just might find three bright stars arranged in an almost-straight line. These three stars make up the Orion’s belt; they are arguably the most recognizable feature that constitutes the Orion constellation – one of the most common celestial phenomenons.

Because constellations can be viewed universally, Orion also has its own cultural significance and mythology in other parts of the world:
Egypt: The celestial representation of Osiris, the god of rebirth. The three stars of the belt were also believed to be aligned with the pyramids of Giza.
China: Called "Shēn Xiù" (The Three Stars). It's categorized by a poem in the Tang dynasty as one of twenty eight mansions, grouped under the symbol of a white tiger.
Mesoamerica: Belongs "The Three Hearthstones", three stars in the constellation that draws a triangle. From which the Mayans believe is creation of life.
There are seven primary stars in the Orion constellation which can be seen from earth. Of course, there are far more stars that lies within the constellation, since space spans to infinity. While these primary stars are given names, they are also classified by various Greek symbols. The only non-primary star in the diagram is Meissa.
The rectangles in the diagram above roughly represents how much more luminous each star is compared to the Sun. Luminosity is the amount of light emitted per second, or in other words, the intrinsic power output of a star. It is measured in solar luminosities relative to the base value of "one", which is that of the Sun.
The story that surrounds Orion's birth comes in a few may variations. The earliest version suggests that Orion is the son of Poseidon, god of the sea, and Euryale, a sister of Medusa. Because of his lineage of godhood, Orion is giant in stature and can walk on water. Another popular and more peculiar version of his birth tells that Orion was born of a bull's hide after Poseidon, Hermes and Zeus urinated on it. His birth was a gift for King Hyrieus, who was rewarded by the gods for his hospitality in inviting them into his royal court; they decided to grant his greatest desire: to have a son.

The 3D diagram illustrates an estimated distance of each star from Earth. To have a more accurate visualization, you will have to imagine the difference in distance of each star to be in hundreds of light years; the closest star to Earth, Bellatrix, is around 250 light years away, while the furthest, Alnilam, is roughly 1,340 light years away.

Orion has a nefarious reputation for being a fearsome and lustful hunter. In an early event of his story, he fell in love with Merope, the daughter of King Oenopion. Angered by the King’s continuous disapproval, Orion assaulted Merope. As revenge, Oenopion sought help from Dionysus, the god of wine, to cast Orion into a deep sleep; the king then blinded Orion, and the only way Orion could restore his sight is by facing the rising sun at the far east of the earth.
Before we study the unique characteristics of each star of the Orion’s belt, I shall briefly explain the some necessary terminologies used in astronomy:
The sound of hammering guided the blinded and confused Orion to Hephaestus’s workshop, the god of metalworking. Hephaestus offered Cedalion, his demi-god servant, to guide Orion to where Helios, the sun god, rose every morning. By sitting upon Orion’s shoulders, Cedalion led him his destination, and Orion’s sight was restored.

Still holding his grudge towards King Oenopion, Orion sought him for revenge back in Chion. However, Orion’s attempt was unsuccessful as Oenopion managed to hide himself safely. Giving up his attempt at revenge, Orion went away to the island of Crete.

Spectral class:
Classified into 7 main groups: O,B,A,F,G,K,M – classified by the surface temperature of the star, from hottest (O), to coolest (M). Each of the 7 groups are further divided into 10 subgroups labelled “0” to “9”. They more accurately classify the temperature variations of each star with “0” being the hottest and “9” being the coolest.

There are two well known versions of Orion’s death. In one of them, Orion is Artmeis’s lover, the goddess of hunt. Her brother, Apollo, the god of music and poetry, grew jealous of their relationship. Artemis devised a plan to kill Orion by challenging Artemis to shoot a faraway target, which was unrecongnizably Orion’s head as he was swimming out at sea. The poignant climax of Orion dying by the hands of his lover has been depicted in many works of art, like the 16th century painting by Daniel Seiter “Artemis next to the dead Orion”.

Celestial Sphere: Similar to the geographical sphere, this diagram helps you locate the exact coordinates of each star on the night sky, as you would on Earth with latitude and longitude. Imagine a large imaginary sphere with the earth at its core. This imaginary sphere also has an equator, north and south pole. But instead of using latitude and longitude, the celestial sphere uses declination and right ascension.

Declination – The celestial latitude. It is measured in positive or negative degrees. “+” being north and “-” being south, and 0° being the celestial equator.
Right ascension – The celestial longitude. It is measured in time: hours, minutes and seconds. 24h would equate to a full (360°) rotation of the sky.

There are two rings around the celestial sphere: the equator, and the ecliptic, which is the path of the Sun traced by the Earth's orbit every year. The point of intersection by the ecliptic and the equator is called an equinox. There are two equinoxes and they are directly opposite from each other. The vernal equinox happens in March and the autumnal equinox happens in September. The rough position of Orion in the sphere is marked out as a star.

In another version, Orion boasted of his exceptional hunting abilities, and out of his arrogance proclaimed that he would hunt every animal on the earth. Upon hearing this, Gaia (Mother Earth) was not pleased, and sent a giant scorpion to stop Orion. This giant scorpion is known as Scorpius, which is also a constellation. After an intense battle, Orion was eventually killed by Scorpius’s sting.

Magnitude:
Simply describes the brightness of the star. There are two types of magnitudes: apparent and absolute.

Apparent magnitude is the brightness of the star from the surface of the Earth (how we currently perceive it).
Absolute magnitude is the brightness of the star at 10 parsecs away from it. Every star is at a different distance away from the Earth, stars closer to Earth obviously tends to appear brighter than those which are further, even if the latter is much brighter. The absolute magnitude creates a standard for all stars, and is therefore a more accurate depiction of the star’s instrinsic brightness.
Alnitak
Alnilam

By the request of Artmeis, Zeus agreed to turn Orion into a constellation, making him an everlasting figure in the skies. Ironically, Zeus also made Scorpius into a constellation opposite of Orion in the celestial sphere, so that everytime Scorpius rises, Orion hides away, creating a celestial chase. Even after death, Orion is still haunted by his greatest demise.

Mintaka

How can one view such great phenomenon, that displays a grandeur unattainable to man, freely and impartially for everyone to see, still feel that one's affairs are all there should be?

Lift up your eyes on high, and behold who hath
created these things,that bringeth out their host by
number: he calleth them all by names by the greatness of
his might, for that he is strong in power; not one faileth.