Transcript Leo Powerpointx

Jennifer Zaremba
Period 9
Leo is the fifth
constellation of the
zodiac. It’s name is
Latin for lion. Leo
lies between dim
Cancer to the west
and Virgo to the
east.
According to Greek mythology, the lion had become a big terror
for the people of Nemes in ancient Greece. Hercules was given
the task of protecting people by killing the lion. The task was the
first of his 12 famous labors, all of which he completed
successfully.
Mythology
The task was not so easy since the lion had an impermeable
skin that could not be torn by any metal, stone or wood.
Hercules was compelled to fight with the beast without any
weapons . The lion lived in a den with two openings into it.
Hercules plugged one of the openings and entered the den
empty-handed from the other. He strangled the lion to his
death and using one of his claws tore away his skin, which he
later used as an impermeable armor on his body for the
remaining 11 tasks that he had to complete.
As Hercules came out successful in his first labor, his step
mother was furious but she couldn't have undone what
Hercules had done. She still managed to raise the soul of
the Lion high up into the sky where, today, it can be seen as
the constellation of Leo.
The first two stars of the Big Dipper point
to Regulus, which is Leo’s brightest star.
Leo is visible from
February through
June. Cancer sets to
the east and Virgo
is to the west.
Hydra and Crater
are below Leo..
Regulus(Alpha Leo)
Denebola (Beta Leo)
Algieba(Gamma Leo)
Zosma (Delta Leo)
Ras Elased Australis (Epsilon Leo)
Adhafera (Zeta Leo)
Chort (Theta Leo)
Al Minliar al Asad (Kappa Leo)
Alterf (Lambda Leo)
Ras Elased Borealis (Mu Leo)
Subra (Omicron Leo)
Deep Sky Objects
Leo contains many bright galaxies, of which Messier
65, Messier 66, Messier 95, and Messier 96 are the
most well-known. The first two are a part of the Leo
Triplet. The Leo Ring, a cloud of hydrogen and
helium gas left over from the Big Bang, is found in
orbit of two galaxies found within this constellation.
Messier 65
Messier 65 is an intermediate spiral galaxy about 22 million light-years away in the
constellation Leo. It was discovered by Charles Messier in 1780.
- An intermediate
spiral galaxy is a
galaxy that is in
between the
classifications of a
barred spiral
galaxy and an
unbarred spiral
galaxy.
A barred spiral
galaxy is a spiral
galaxy with a
central bar-shaped
structure composed
of stars.
An unbarred
spiral galaxy is
a type of spiral
galaxy without
a central bar.
Messier 66
Messier 66 is an intermediate spiral galaxy about 36 million light-years away in the
constellation Leo. It was discovered by Charles Messier in 1780.
A barred spiral galaxy is a
spiral galaxy with a
central bar-shaped
structure composed of
stars.
An unbarred spiral galaxy
is a type of spiral galaxy
without a central bar.
-An intermediate spiral
galaxy is a galaxy that
is in between the
classifications of a
barred spiral galaxy
and an unbarred spiral
galaxy.
Messier 95
Messier 95 is a barred spiral galaxy about 33 million light-years away in the constellation Leo. It
was discovered by Pierre Méchain in 1781, and catalogued by Charles Messier four days later.
A barred spiral galaxy is a spiral galaxy
with a central bar-shaped structure
composed of stars.
Messier 96
Messier 96 is an intermediate spiral galaxy about 31 million light-years away in the
constellation Leo. It was discovered by Pierre Méchain in 1781.
- An intermediate spiral
galaxy is a galaxy that is in
between the classifications of
a barred spiral galaxy and an
unbarred spiral galaxy.
A barred spiral galaxy is a
spiral galaxy with a central
bar-shaped structure
composed of stars.
An unbarred spiral
galaxy is a type of
spiral galaxy without a
central bar.
Regulus
Regulus, shining at the heart of Leo the Lion, is near the end of the
list of first magnitude stars. At a distance of only 79 light years, it
shines in our sky at magnitude 1.35. The Latin name means "the little
king," the reference to a kingly star going back to ancient times.
Regulus marks the end of a group of stars called the "Sickle of Leo," a
sickle-shaped figure that outlines the head of the Lion. The star is
almost exactly on the ecliptic, the path of the Sun, and is regularly
covered over by the Moon. Regulus is a "main sequence" star, a socalled dwarf that like the Sun, is fueled by the internal fusion of
hydrogen into helium. Though technically a dwarf, Regulus is still
visually 150 times brighter than the Sun.
Denebola
Denebola, Leo's Beta star, is the easternmost
of a triangle of stars set to the east of
Regulus. It has a magnitude of 2.14. Denebola
is a white class A (dwarf (hydrogen-fusing)
star of a temperature of 8500 degrees Kelvin.
At a distance of36 light years, it appears more
dim than it actually is. Denebola is more
luminous than the Sun, emitting 12 times the
solar energy.
Sources
www.astro.uinc.edu
www.astro.wisc.edu/~dolan/constellations
www.dibonsmith.com/stars.htm