Hello guys, today I will tell you about shooting
star. I think It’s not strange again yeah, so let’s we check It guys!
Shooting star? What is it? maybe someone that didn’t
know think that it is a phenomenon when a star fall to the earth, but No! It’s
a false statement. Star is a luminous sphere of plasma held together by its own
gravity and It is very big, the diameter is 40 km until 900.000.000 km, It’s
very big right? For your Information, Sun is the one of star too. So, because
It’s bigger than earth, If it fall down, the earth will broken.
So,
what is shooting star, shooting star is the phenomenon when an object from a
space that usually we call meteorid fall down to the earth, a meteoroid is a small rocky
or metallic body travelling through space.
Meteoroids are significantly smaller
than asteroids, and range in size from small grains to 1 meter-wide
objects. Smaller objects than this are classified as micrometeoroids or space dust. Most are fragments from comets or asteroids, while others are collision impact debris ejected from bodies such as the Moon or Mars.
When such an object enters the Earth's atmosphere at a speed
typically in excess of 20 km/s, aerodynamic heating produces a streak of light, both from the glowing
object and the trail of glowing particles that it leaves in its wake. Ya! This
phenomenon that we call “Shooting star” or “Falling star” or “Meteor”.
A meteor
or "shooting star" is the passage of a meteoroid or micrometeoroid
into the Earth's atmosphere, incandescent from air friction and shedding
glowing material in its wake sufficiently to create a visible streak of light.
Meteors typically occur in the mesosphere at altitudes between 76 to 100 km (47 to
62 mi) The root word meteor comes from the Greek meteĊros, meaning "high in the air."
Millions of meteors occur in the Earth's atmosphere daily. Most meteoroids
that cause meteors are about the size of a grain of sand. Meteors may occur in showers, which
arise when the Earth passes through a stream of debris left by a comet, or as
"random" or "sporadic" meteors, not associated with a
specific stream of space debris. A number
of specific meteors have been observed, largely by members of the public and
largely by accident, but with enough detail that orbits of the meteoroids
producing the meteors have been calculated. All of the orbits passed through
the asteroid belt. The atmospheric velocities of meteors result from
the movement of Earth around the Sun at about 30 km/s (18 miles/second), the orbital
speeds of meteoroids, and the gravity well of Earth
History
Although
meteors have been known since ancient times, they were not known to be an
astronomical phenomenon until early in the 19th century. Prior to that, they
were seen in the West as an atmospheric phenomenon, like lightning, and were
not connected with strange stories of rocks falling from the sky.
Thomas Jefferson wrote "I would more easily believe that (a)
Yankee professor would lie than that stones would fall from heaven." He
was referring to Yale chemistry professor Benjamin Silliman's investigation of an 1807 meteorite that fell in Weston, Connecticut. Silliman believed the meteor had a cosmic origin,
but meteors did not attract much attention from astronomers until the
spectacular meteor storm of November 1833. People all across the eastern United
States saw thousands of meteors, radiating from a single point in the sky.
Astute observers noticed that the radiant, as the point is now called, moved
with the stars, staying in the constellation Leo.
The astronomer Denison Olmsted made an extensive study of this storm, and concluded
it had a cosmic origin. After reviewing historical records, Heinrich Wilhelm Matthias Olbers predicted
the storm's return in 1867, which drew the attention of other astronomers to
the phenomenon. Hubert A. Newton's more thorough historical work led to a refined
prediction of 1866, which proved to be correct. With Giovanni Schiaparelli's success in connecting the Leonids (as they
are now called) with comet Tempel-Tuttle, the cosmic
origin of meteors was now firmly established. Still, they remain an atmospheric
phenomenon, and retain their name "meteor" from the Greek word for
"atmospheric".
Notable meteors
1992—Peekskill, New York
The Peekskill Meteorite was filmed on October 9, 1992
by at least 16 independent videographers. Eyewitness accounts indicate the
fireball entry of the Peekskill meteorite started over West Virginia at 23:48
UT (±1 min). The fireball, which traveled in a northeasterly direction,
had a pronounced greenish colour, and attained an estimated peak visual
magnitude of −13. During a luminous flight time that exceeded 40 seconds the
fireball covered a ground path of some 700 to 800 km. One meteorite
recovered at Peekskill, New York, for which the event and object
gained their name, had a mass of 12.4 kg (27 lb) and was subsequently
identified as an H6 monomict breccia meteorite. The video record suggests that
the Peekskill meteorite had several companions over a wide area. The companions
are unlikely to be recovered in the hilly, wooded terrain in the vicinity of
Peekskill.
2009—Bone, Indonesia
A large
fireball was observed in the skies near Bone, Indonesia on October 8,
2009. This was thought to be caused by an asteroid approximately 10 meters in
diameter. The fireball contained an estimated energy of 50 kilotons of TNT, or
about twice the Nagasaki atomic bomb. No injuries were reported.
 |
| Bone, 08-11-09 |
2009—Southwestern US
A large
bolide was reported on 18 November 2009 over southeastern California, northern
Arizona, Utah, Wyoming, Idaho and Colorado. At 00:07 local time a security
camera at the high altitude W. L. Eccles Observatory (2930 m above sea level)
recorded a movie of the passage of the object to the north. Of particular note
in this video is the spherical "ghost" image slightly trailing the
main object (this is likely a lens reflection of the intense fireball), and the
bright fireball explosion associated with the breakup of a substantial fraction
of the object. An object trail can be seen to continue northward after the
bright fireball event. The shock from the final breakup triggered seven
seismological stations in northern Utah; a timing fit to the seismic data
yielded a terminal location of the object at 40.286 N, -113.191 W, altitude
27 km. This is above the Dugway Proving Grounds, a closed Army testing
base.
2013—Chelyabinsk Oblast, Russia
Over 1,500
people were injured mostly by glass from shattered windows caused by a
meteoroid explosion during meteor event
in Chelyabinsk Oblast, Russia on
15 February 2013, when a meteoroid exploded approx 25 to 30 km above the environs of Chelyabinsk, Russia. An increasingly
bright streak was observed during morning daylight with a large contrail
lingering behind. At no less than 1 minute and up to at least 3 minutes after
the object peaked in intensity (depending on distance from trail), a large
concussive blast was heard that shattered windows and set-off car alarms, which
was followed by a number of smaller explosions. Scientists at NASA's Jet
Propulsion Laboratory (JPL)
estimated the meteoroid to have an initial mass of 11,000 tonnes, and to
measure approximately 17 to 20 metres across, as it entered the earth's
atmosphere.
MITOLOGY
OF STARSHOOT
Because they are so sudden and short-lived, shooting stars inspire many
myths about wishing and omens. Nowadays, When there are a starshoot, people
will pray cause they believe that
when
It’s happen, god will hear your pray and your wish will be granted, but Is it
true? In my belief, god will always hear our pray, and It’s not related with
star. It’s all about your belief and your faith:)
Traditionally, shooting stars were seen as omens of dangerous times for
Europeans. Current myths about shooting stars revolve around making a wish when
one is seen.
Although older myths about shooting stars generally held them as omens, modern
myths are often more related to misunderstandings about science. Many people
believe that meteors are large pieces of rock, maybe even big enough to kill a
person or to destroy the earth. Actually, most meteors are no larger than
specks of dust, and only the largest meteors even reach the ground.
Myths about shooting stars vary greatly around the world. In East Africa,
some tribes consider them to be the manifestations of a deity, while others see
them as bad omens. Native American tribes had a wide variety of beliefs about
shooting stars, seeing them as war omens, as traveling spirits of shamans and
heroes, and even as the feces of stars.
Most shooting-star myths are based on beliefs related to the observed
phenomena. Meteors do look like stars shooting through the sky. Their sudden
appearance can be startling, which may explain why shooting stars are so often
seen as bad omens. Occasionally, pieces of meteor do reach the ground, leading
people to think that all shooting stars leave debris.
Meteors as Omens
- In Switzerland, a meteor was considered to possess the power of God.
- Swabians believed that a shooting star presaged a year of good fortune,
but if one saw three in one night, then he was doomed to die.
- In Chile, one must pick up a stone when sees a meteor.
- In the Philippines, one must tie a knot in a handkerchief before the
light is extinguished.
-
Modern Hawaiian Japanese are reported to believe that if a meteor comes
in your direction, you must open the collars of your kimono to admit the good
luck.
- In Baltic countries and central Europe, people believed that everyone
had a personal star which fell upon his or her death. This led some to say such
things as 'rest in peace' or 'may God guide you to a good path' upon seeing a
meteor.
- Pointing to a meteor or talking of a meteor was considered bad luck by
some in America.
- Among those who believed meteors signaled ill-omen, saying certain words
could avert the bad luck--for example, 'amen,' 'God guide it,' or 'go away, go
away, all by yourself.'
- Perhaps the most famous omen was that divined form the Ensisheim stony
meteorite which fell in Alsace (now in France) in 1492. The Holy Roman Emperor
Maximillian assembled his council to help determine the meaning of the fall.
The council determined that it as a good omen in his wars with France and the
Turks.
There Is a video of a meteor that hits Rusia at 2013
Source:
