Comets, Meteors and Asteroids | Grade 8 Science DepEd MELC Quarter 2 Module 5

00:09:40
https://www.youtube.com/watch?v=zemP1zQ2Vko

Ringkasan

TLDRRecent technological advances in space exploration have enhanced the study of near-Earth objects such as comets and asteroids, offering insights into the origins of our solar system. The video provides an exploration of these celestial bodies. Comets, historic symbols of bad luck, are snowballs of rock and ice with tails formed from solar winds. They originate from areas like the Oort Cloud and possibly explain the extinction of dinosaurs due to a hypothetical impact event. Meteors, often called shooting stars, burn up in Earth's atmosphere, with their colors determined by chemical composition. The difference between meteoroids, meteors, and meteorites is based on their location and interaction with Earth's atmosphere. Asteroids, smaller than planets and situated mainly in the asteroid belt between Mars and Jupiter, are rocky formations that sometimes shift due to gravitational influences. This information underscores the dynamic and interconnected nature of celestial phenomena in our solar system.

Takeaways

  • 🌌 Advancement in space technologies aids in studying near-Earth objects.
  • 🌠 Comets are icy celestial bodies and symbols of ancient superstitions.
  • 🌙 Meteor occurs when a meteoroid enters the Earth's atmosphere and burns up.
  • 🌞 Comet tails form from solar winds as they near the sun.
  • 🔭 Asteroids primarily inhabit the asteroid belt between Mars and Jupiter.
  • ☄️ Comets may originate from the Oort Cloud, a distant region in space.
  • 🌍 Celestial impacts, like comets, may have led to past Earth extinctions.
  • ⭐ Meteoroids in space differ based on their interaction with Earth’s atmosphere.
  • 🌪️ Solar winds influence the formation of comet tails.
  • 📚 Studies of comets, meteors, and asteroids reveal solar system origins.

Garis waktu

  • 00:00:00 - 00:09:40

    Technological advancements have enabled scientists from various fields to study near-Earth objects like comets and asteroids. The video will explore these celestial bodies, providing insights into their origins and nature. Historically, comets were seen as omens, but scientifically, they are formed of rock, dust, and ice, originating from a distant cloud called the Oort Cloud. The video also introduces meteors, their distinct features, and elaborates on the phenomena of meteoroids, asteroids, and fireballs within the cosmos.

Peta Pikiran

Mind Map

Pertanyaan yang Sering Diajukan

  • What did ancient people believe about comets?

    Ancient people often saw comets as bad omens, associating them with mourning or disaster.

  • How do comets form their tails?

    Comets form tails when they approach the sun, causing the ice to melt and gas to be released, which is then pushed away by solar winds.

  • What is a meteor?

    A meteor is what we see when a meteoroid enters Earth's atmosphere and burns up, creating a streak of light.

  • Where do most comets originate from?

    Most comets are thought to originate from a huge, distant cloud called the Oort Cloud.

  • How are meteoroids, meteors, and meteorites different?

    Meteoroids are space rocks; meteors are meteoroids that burn up in the Earth's atmosphere; and meteorites are meteors that hit the Earth.

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Gulir Otomatis:
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    [Music]
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    recent advances in space technology
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    have allowed scientists coming from
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    different backgrounds
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    such as physics chemistry biology
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    and geology to collaborate on studying
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    near-earth
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    objects such as comets and asteroids
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    with more powerful telescopes and
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    spacecrafts
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    the study of comets and asteroids
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    provide
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    more clues about the origins of our
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    solar system
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    in this video we will take you on a
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    flyby tour outside the earth
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    providing you a closer look at the
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    asteroids
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    comets and natures in space so let's get
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    started
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    people have been aware of comets since
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    ancient times
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    try to ask your grandfather or
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    grandmother about comets and they might
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    tell you that a comet brings bad luck
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    why some people believe that comets were
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    bad spirits
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    who took on the appearance of a head of
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    a woman with its
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    long hair streaming behind
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    to old folks this was a traditional sign
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    of mourning
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    sometimes to other people a comet
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    appeared as sword
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    which is a sign of war death and famine
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    a comet is a fuzzy luminous big snowball
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    composed of rock dust
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    wrap around a big ball of ice they are
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    icy objects
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    this beautiful sight in the sky moves
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    very slowly
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    and may remain in our sight for weeks
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    before fading out of view
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    a comet enters a huge elliptical orbit
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    each time the comet passes close to the
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    sun
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    it loses some of its material when it
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    returns to the distant part of the solar
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    system
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    it gradually appears smaller and dimmer
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    over time it disappears completely
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    in some cases the comet may have a solid
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    rocky core that is then left to continue
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    traveling around its orbit as a dark
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    barren asteroid
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    as it gets closer to the sun it becomes
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    visible because the heat of the sun
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    melts the ice of the comet
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    and turns it to gas this gas becomes the
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    comma
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    which wraps and hides the nucleus from
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    our view
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    the nucleus is the center of the comet
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    made of frozen water the nucleus and the
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    comet together
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    are called the head of the comet they
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    become bigger and bigger as more
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    gas and dust are released from the comma
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    the solar wind
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    blows more and more gas from the comma
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    causing it to form a tail
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    which in some comets can reach up to 150
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    million kilometers in length
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    most comets are thought to originate
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    from a huge cloud called the word cloud
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    which is too far away for astronomers to
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    see
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    there is no evidence that a comet has
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    ever crashed into earth
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    however it is one possible explanation
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    for the extinction of dinosaurs
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    the hypothesis is that a large comet or
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    asteroid crashed into our planet and
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    triggered a chain of disastrous events
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    like earthquakes and tidal waves causing
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    radical changes in the climate
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    and eventually wiped out the dinosaurs
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    now that we're done discussing about
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    comets
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    let's talk about meteors
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    a meteor is also called the falling star
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    or
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    shooting star a meteor is observed when
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    a meteoroid passes through
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    earth's atmosphere and burns up in the
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    process
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    when meteors hurtle through the layer of
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    air surrounding earth
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    friction caused by the molecules of gas
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    that make up our planet's atmosphere
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    heats them up and the meteor surface
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    begins to warm up and glow eventually
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    the heat and high speed combine to
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    vaporize the meteor
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    usually high above the earth's surface
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    the visible light produced by a major
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    may take on various hues
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    depending on the chemical composition of
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    the meteoroid
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    and the speed of its movement through
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    the atmosphere
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    the color of meteors depend on the
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    relative
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    influence of the metallic content of the
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    meteoroid
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    versus the superheated air plasma which
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    is brought about by its passage
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    orange yellow for sodium yellow
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    for iron blue green for magnesium
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    violet for calcium and red for
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    atmospheric nitrogen and oxygen
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    [Music]
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    so what's the difference between a
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    meteoroid meteorite
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    and a fireball they're all related to
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    the flashes of light called shooting
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    stars
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    sometimes seen streaking across the sky
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    but we call the same object by different
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    names
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    depending on where it is meteoroids
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    are objects in space that range in size
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    from dust grains to small asteroids
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    think of them as space rocks when
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    meteoroids
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    enter earth's atmosphere or that of
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    another planet at high speed
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    and burn up the fireballs or shooting
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    stars
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    are called meteors when a meteorite
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    survives a trip
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    through the atmosphere and hits the
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    ground it's called a meteorite
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    [Music]
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    here are some interesting facts about
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    meteors
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    did you know that there are millions of
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    meters in the earth's
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    atmosphere every day meteors can become
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    visible as high as 120 kilometers above
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    earth if a meteor produces a sound
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    called a sonic boom it is typically
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    heard
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    seconds after the meteor becomes visible
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    meteors are usually the size of pebbles
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    and no larger than a baseball
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    although meteors have existed since
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    ancient times they were not believed to
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    be from our solar system
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    until 1833
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    asteroids are simply rocky or metallic
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    objects that orbit the sun in the same
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    way that planets orbit
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    asteroids are hard to see because they
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    reflect little light
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    and they are always on the move
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    asteroids come in all sizes and shapes
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    some are as tiny as pebbles and some are
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    as big as mountains
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    since they are smaller than planets they
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    are often called minor planets or
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    planetoids
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    cerus which was once considered the
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    largest asteroid
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    is now classified as a dwarf planet it
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    is about
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    940 kilometers in diameter can you
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    imagine how huge that is
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    nearly all asteroids are irregular in
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    shape and heavily pockmarked by impact
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    craters
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    only a handful of the largest members
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    possess enough gravity
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    to pull them into spherical shapes
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    [Music]
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    many asteroids orbit the sun in a region
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    between mars and jupiter
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    this area is called asteroid belt
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    they follow a slightly elliptical path
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    as they orbit the sun
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    in the same direction as the planets a
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    larger object
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    such as a planet may pull an asteroid
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    out of orbit
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    if it were not for the giant planet
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    jupiter pulling the asteroids outward
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    large asteroids would constantly bombard
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    mercury
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    venus mars and earth
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    now let's wrap things up comets
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    asteroids and majors are considered as
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    celestial objects that orbit around the
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    sun
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    they come in different sizes and shapes
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    asteroids are small rocky objects that
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    orbit the sun
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    they are smaller than a planet but they
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    are larger than the pebble-sized objects
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    we call meteorites
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    comets orbit the sun like asteroids
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    but comets are made of ice and dust not
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    rock a comet has three parts
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    the nucleus head and a tail
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    a meteor is what happens when a
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    meteoroid
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    a small piece of an asteroid or comet
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    burns up upon entering earth's
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    atmosphere
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    creating a streak of lightened sky
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    that's all for now see you on our next
  • 00:09:25
    video
  • 00:09:25
    and don't forget to keep your minds busy
  • 00:09:30
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Tags
  • space technology
  • comets
  • asteroids
  • meteors
  • solar system
  • Oort Cloud
  • extinction
  • celestial bodies
  • asteroid belt
  • space exploration