a message was published in mass media
nasa scientists issued an emergency
warning an asteroid the size of the
egyptian pyramid is moving towards our
planet there's a high probability of
collision the appropriate date of
collision is may 6 2022
immediately some experts stated that if
such an asteroid hit the earth it would
have been equal to 230 kilotons of tnt
and this is about 15 hiroshima
explosions statements like this are
always blood curdling but before
panicking watch the full video first
nasa's warning quickly raised our fears
not just because of the existing threat
but because of the size of the asteroid
dubbed 2009 jf1
normally to measure things scientists
use meters kilometers or astronomical
units but not physical objects like
egyptian
pyramids and what kind of pyramid were
they talking about in the first place
after all there are dozens of them in
the giza valley we turned to the
official nasa website and didn't find a
word about the asteroid 2009 jf1
no alarming headlines like those in some
media sources were found so far
everything makes it seem like another
fake news
the russian roz cosmos space agency has
already reacted to the warning the
agency conducted several astrometric
observations of the asteroids movement
and found out that instead of may the
sixth it would fly past the earth on may
the 15th
and this would happen at a safe distance
of 23 million kilometers
at the same time the object doesn't
cease to be potentially dangerous but
the degree of this danger doesn't exceed
one to one seven hundred thousand
that is the danger was greatly
exaggerated
but that doesn't mean it doesn't exist
at all especially according to recent
events
february 15 2013 chelyabinsk region
russia 9 20 am local time 12 20 pm new
york time a hot ball rushed across the
sky leaving a thick contrail behind it
all this was accompanied by a strong
roar
this is how the world learned about the
chelyabinsk meteorite as it turned out
later an asteroid with a diameter of
about 18 meters and a mass of about 11
000 tons entered the earth's atmosphere
at a speed of roughly 18.6 kilometers
per second
approximately 32 seconds later the
celestial body collapsed and generated a
shock wave
according to nasa's estimates the amount
of energy released was about 440
kilotons of tnt
a total of
[Music]
and fifteen 1615lb
were injured mostly from broken glass
according to different sources 40 to 112
people were hospitalized two victims
were placed in intensive care units
aside from that the shock wave also
damaged buildings
the total amount of damage was about 30
million dollars
fortunately fragments from the asteroid
the largest of which weighed about 500
kilograms landed in a deserted area
neither astronomical services nor the
russian missile defense system were able
to detect the intruder on the very same
day before everything happened nasa
warned that an asteroid would fly past
the earth
however they weren't talking about the
chelyabinsk meteorite but the asteroid
named duende 16 hours after the events
in russia an asteroid about the same
size as the chelyabinsk meteorite flew
past our planet at a distance of 27 000
kilometers
but even without another impressive
demonstration of their power humanity
has already realized how fatal a
collision of the earth with an asteroid
can be
in 1991 autonomous observation systems
began a regular survey of the sky
jointly with the us military nasa
created the near earth asteroid tracking
program to search for near-earth
asteroids and comets using a 1.2 meter
telescope in hawaii
afterwards other programs with the same
mission were created as well
the number of known near-earth asteroids
is rapidly growing on average about 30
new asteroids are discovered weekly and
more than 95 percent of neas are
detected by nasa-funded observing
programs to date about 3 000 potentially
dangerous asteroids have been found
astronomers call such celestial bodies
potentially hazardous objects and they
include asteroids that can approach the
earth at a distance of less than
0.05 au this is closer than 7 million
479
894 kilometers but still more than 19
times the distance between the earth and
the moon
also an absolute magnitude of phos
should be 22 units or less the smaller
the magnitude the brighter the object
and therefore larger
in practice this means objects with a
diameter of at least 100 to 150 meters
a space body this size is large enough
to cause unprecedented destruction on
land or a giant tsunami if it falls into
the ocean and because the asteroid 2009
jf-1 doesn't meet any of the
above-mentioned criteria it doesn't fit
into the category of potentially
hazardous objects
based on information obtained from the
wise space telescope
there are between 3200 and 6200
potentially dangerous objects with a
diameter of more than 100 meters
this is why scientists created a
specific logarithmic scale to assess
potential hazards from such celestial
bodies the scale uses two types of data
kinetic energy and the probability of
collision
since 2017 mankind has been celebrating
international asteroid day on june the
30th every year it aims to raise public
awareness about the asteroid impact
hazard and possible methods of
preventing such collisions with the
earth
the date wasn't picked by chance on june
30th 1908 the infamous tunguska
meteorite fell on earth luckily it
landed in a deserted coniferous forest
region or tiger
but had it fallen a few hours later it
would have hit petersburg the former
capital of the russian empire this is
because the city was on the same
latitude as the site of the collision
so how big was the explosion
a nuclear explosion in hiroshima was in
the range of about 13 to 15 kilotons of
tnt equivalent and the tunguska
meteorite was about 100 times more
powerful than that
but what kind of space rocks are
astronomers afraid of now
there are three most potentially
dangerous celestial bodies
the asteroid named 1950 da is one of
them and it has the highest palermo
rating minus 1.42
its closest approach to us will happen
in 2032 but since the asteroid has a
period of revolution around the sun of
only 2.2 years it'll make several
approaches before that
and the closest one or possibly a
collision could happen on march the 16th
2880
in case of a collision human
civilization will face catastrophic
consequences given we managed to survive
this long
if this is the case our descendants will
have to prepare for global climate
change and the death of a significant
part of the biosphere
the diameter of the asteroid is 1.3
kilometers and its mass according to
various calculations ranges from 2 to 4
billion tons so we can only imagine how
big of an impact it could cause
the second asteroid is 101 955 bennu
on the palermo scale it's a bit lower
minus 1.71
in 2135 it'll be traveling at a distance
of only 300 000 kilometers from the
earth which is even closer than the moon
the date of the possible collision is
somewhere between 2175 and 21.99 the
asteroid revolves around the sun every
1.2 years which means that during this
period it'll come close to our planet 78
times
with a mass of about 60 to 78 million
tonnes the average diameter of the
asteroid is more than 510 meters if it
fell on earth an impact would have been
equivalent to the explosion of a bomb
with a capacity of 1150 megatons of tnt
the tunguska meteorite was able to knock
down centuries-old trees within a radius
of
2150 kilometers squared to compare the
entire land area of new york is just 784
kilometers squared 101 955 bennu would
be 20 times more powerful
asteroid 41077
is the last one on our list and it's a
bit different because it's a binary
asteroid
similar to a binary star the system
consists of two gravitationally
connected celestial bodies that revolve
around a common center of mass
the first component of the asteroid is a
celestial body with a diameter of 120 to
180 meters while the second one measures
about 60 to 120 meters its palermo
rating is -1.78
and it has a striking mass of roughly
3.2 million tons
according to the theory of probability
an asteroid capable of causing
catastrophic consequences for the entire
civilization will one day hit our planet
and we can only hope that by that time
people will be able to prevent any
possible fatal collision
[Music]
you