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  • 00:00

    The recent reigning Queen of everything, once said “If you like it, then you shoulda put
    The recent reigning Queen of everything, once said “If you like it, then you shoulda put

  • 00:06

    a ring on it”, well I like the Earth, why wasn’t a ring put on it?
    a ring on it”, well I like the Earth, why wasn’t a ring put on it?

  • 00:12

    Hey everyone, Julia here for Dnews.
    Hey everyone, Julia here for Dnews.

  • 00:17

    A researcher from the University of Rochester, Eric Mamajek, recently took another look at
    A researcher from the University of Rochester, Eric Mamajek, recently took another look at

  • 00:22

    some odd readings from a star 420 million light years from Earth.
    some odd readings from a star 420 million light years from Earth.

  • 00:26

    The starlight emanating from the faraway solar system seemed to dim frequently indicating
    The starlight emanating from the faraway solar system seemed to dim frequently indicating

  • 00:30

    a planet passing in front of it.
    a planet passing in front of it.

  • 00:32

    In most cases like this, the dimming lasts a few hours, however this star’s dimming
    In most cases like this, the dimming lasts a few hours, however this star’s dimming

  • 00:36

    was lasting a few months.
    was lasting a few months.

  • 00:38

    His interpretation?
    His interpretation?

  • 00:40

    A scaled up version of Saturn.
    A scaled up version of Saturn.

  • 00:41

    A big planet with HUGE RINGS.
    A big planet with HUGE RINGS.

  • 00:43

    This planet would be about 10-40 times the size of Jupiter.
    This planet would be about 10-40 times the size of Jupiter.

  • 00:46

    Its rings?
    Its rings?

  • 00:47

    EVEN BIGGER.
    EVEN BIGGER.

  • 00:48

    If they exist, they would span the width of here to the sun.
    If they exist, they would span the width of here to the sun.

  • 00:51

    That’s 93 million miles.
    That’s 93 million miles.

  • 00:53

    It’s so big, it leaves many scientists skeptical.
    It’s so big, it leaves many scientists skeptical.

  • 00:57

    So while they still puzzle over that mystery, let’s take a look at why planetary rings
    So while they still puzzle over that mystery, let’s take a look at why planetary rings

  • 01:00

    form at all.
    form at all.

  • 01:01

    Four of the planets in our solar system have rings, the gas giants, Jupiter and Saturn,
    Four of the planets in our solar system have rings, the gas giants, Jupiter and Saturn,

  • 01:05

    and the ice giants Uranus and Neptune.
    and the ice giants Uranus and Neptune.

  • 01:07

    Their rings aren’t a giant solid disk, they’re a bunch of smaller rings made up of smaller
    Their rings aren’t a giant solid disk, they’re a bunch of smaller rings made up of smaller

  • 01:11

    particles, like bits of rock and dust and even ice.
    particles, like bits of rock and dust and even ice.

  • 01:14

    Saturn’s big ring is made up of thousands of smaller wide rings of ice that reflect
    Saturn’s big ring is made up of thousands of smaller wide rings of ice that reflect

  • 01:17

    a lot of sunlight, so they’re super visible to us on Earth, I mean with a telescope of
    a lot of sunlight, so they’re super visible to us on Earth, I mean with a telescope of

  • 01:22

    course.
    course.

  • 01:23

    Galileo first discovered Saturn’s rings in 1610.
    Galileo first discovered Saturn’s rings in 1610.

  • 01:26

    Jupiter, Uranus, and Neptune’s rings are thin and dusty, so they’re not as visible
    Jupiter, Uranus, and Neptune’s rings are thin and dusty, so they’re not as visible

  • 01:30

    to us and took a little longer to find.
    to us and took a little longer to find.

  • 01:32

    Jupiter’s rings weren’t discovered until 1979 by the Voyager 1 space probe and Neptune’s
    Jupiter’s rings weren’t discovered until 1979 by the Voyager 1 space probe and Neptune’s

  • 01:38

    weren’t found until a decade later, by the Voyager 2 space probe.
    weren’t found until a decade later, by the Voyager 2 space probe.

  • 01:42

    Planetary rings form in a few ways: Possibly in the early days when the planets were forming
    Planetary rings form in a few ways: Possibly in the early days when the planets were forming

  • 01:46

    from a mass of space dust, this debris never made it into the final planet, so it just
    from a mass of space dust, this debris never made it into the final planet, so it just

  • 01:50

    kind of hangs out in orbit.
    kind of hangs out in orbit.

  • 01:51

    Or the rings might form when planetary satellites, like a moon, get too close and get pulled
    Or the rings might form when planetary satellites, like a moon, get too close and get pulled

  • 01:56

    apart by the planet’s gravity.
    apart by the planet’s gravity.

  • 01:57

    These two theories could explain Saturn’s rings.
    These two theories could explain Saturn’s rings.

  • 02:00

    Most of the other planet’s dusty, thin rings formed when their moons were hit by something
    Most of the other planet’s dusty, thin rings formed when their moons were hit by something

  • 02:04

    and that impact kicked up dust and particles.
    and that impact kicked up dust and particles.

  • 02:06

    The earth had a ring too once.
    The earth had a ring too once.

  • 02:08

    It just coalesced into the moon.
    It just coalesced into the moon.

  • 02:10

    So why don’t Saturn’s rings turn into a moon?
    So why don’t Saturn’s rings turn into a moon?

  • 02:11

    The rings are simply too close to the planet.
    The rings are simply too close to the planet.

  • 02:12

    They are within what is called The Roche Limit named after a French astronomer, Edouard Roche,
    They are within what is called The Roche Limit named after a French astronomer, Edouard Roche,

  • 02:15

    who calculated this theoretical limit in 1848.
    who calculated this theoretical limit in 1848.

  • 02:19

    Inside the limit, the debris remains as rings.
    Inside the limit, the debris remains as rings.

  • 02:21

    Outside of the limit, debris coalesces into larger bodies, like a moon.
    Outside of the limit, debris coalesces into larger bodies, like a moon.

  • 02:24

    When a satellite, like a moon, gets too close to the planet and it can’t withstand the
    When a satellite, like a moon, gets too close to the planet and it can’t withstand the

  • 02:28

    tidal forces caused by the planet’s gravity, it disintegrates.
    tidal forces caused by the planet’s gravity, it disintegrates.

  • 02:31

    Our moon is out side of the Earth’s Roche limit, so it remains spherical.
    Our moon is out side of the Earth’s Roche limit, so it remains spherical.

  • 02:34

    But what if it fell into the Roche Limit?
    But what if it fell into the Roche Limit?

  • 02:36

    What if the Earth had rings like Saturn?
    What if the Earth had rings like Saturn?

  • 02:38

    It would look pretty awesome, something like this.
    It would look pretty awesome, something like this.

  • 02:40

    What do you think?
    What do you think?

  • 02:42

    how cool would it be if earth had rings?
    how cool would it be if earth had rings?

  • 02:43

    let us know in the comments below!
    let us know in the comments below!

All

Why Doesn’t Earth Have Rings?

302,748 views

Video Language:

  • English

Caption Language:

  • English (en)

Accent:

  • English (US)

Speech Time:

99%
  • 2:48 / 2:49

Speech Rate:

  • 203 wpm - Fast

Category:

  • Science & Technology

Intro:

The recent reigning Queen of everything, once said “If you like it, then you shoulda put
a ring on it”, well I like the Earth, why wasn’t a ring put on it?
Hey everyone, Julia here for Dnews.. A researcher from the University of Rochester, Eric Mamajek, recently took another look at
some odd readings from a star 420 million light years from Earth.
The starlight emanating from the faraway solar system seemed to dim frequently indicating
a planet passing in front of it.. In most cases like this, the dimming lasts a few hours, however this star’s dimming
was lasting a few months.. His interpretation?. A scaled up version of Saturn.. A big planet with HUGE RINGS.. This planet would be about 10-40 times the size of Jupiter.
Its rings?. EVEN BIGGER.. If they exist, they would span the width of here to the sun.
That’s 93 million miles.. It’s so big, it leaves many scientists skeptical.. So while they still puzzle over that mystery, let’s take a look at why planetary rings
form at all..

Video Vocabulary

/ˈplanət/

noun other

celestial body moving round star. One of the bodies that orbit the sun.

/ˈrēs(ə)ntlē/

adverb

at recent time.

/ˈpasiNG/

adjective noun verb

going past. passage of something. To approve a law or proposal.

/ˈfärəˌwā/

adjective

Far removed mentally.

/ˈplanəˌterē/

adjective

Concerning the orbital characteristics of a planet.

/ˈlastiNG/

adjective verb

Remaining to the end. To remain or continue for a certain period of time.

/ˈsīəntəst/

noun other

person who is studying or has expert knowledge of one or more of natural or physical sciences. People who are trained in a science.

/ˈfrēkwəntlē/

adverb

regularly or habitually.

/ˈstärˌlīt/

noun

Light of the stars.

/əˈnəT͟Hər/

adjective determiner pronoun

One more, but not this. One more added. additional person or thing of same type.

/ˈvərZHən/

noun verb

An updated form of some software. create new version of.

/ˈTHouz(ə)nd/

number

number equivalent to product of hundred and ten.

/ˈeməˌnāt/

verb

(Of light, smell, etc.) to come out from.