they are nestled in the final frontier
countless worlds scattered throughout
Kells galaxies challenge the notion that
we are alone in the universe
[Music]
exoplanets are worlds that exist outside
of our solar system also known as
extrasolar planets these bodies often
orbit their own stars with some being a
part of entire planetary systems
exoplanets are made of the same elements
as the worlds in our solar system and
based on their composition and
structures are just as diverse some
known as giant or neptune-like planets
are large gaseous worlds other gas
giants called hot Jupiters closely orbit
their stars causing the planets to have
high surface temperatures another
category of exoplanets consists of super
Earths smaller than the gas giants but
larger than Earth super Earths are
terrestrial and made primarily of rocky
or icy material the final category
includes earth analogs much as their
name implies earth analogs are similar
to earth in various ways including size
composition and distance to their home
star exoplanets are difficult to detect
directly mostly because they are
outshined by the Stars the orbit
to circumvent this about five primary
methods have been developed to find
these planetary bodies including radial
velocity in which a planet causes a star
to wobble direct imaging where the glare
of stars is blocked in order to see
objects nearby astrology which observes
the Stars movements in relation to
nearby stars gravitational microlensing
which observes the light of a star being
bent by a planet’s gravitational pull
and the most prolific form of finding
exoplanets transit the method in which a
planet passes between its star and earth
thereby dimming its star’s light
[Music]
scientists have suspected the existence
of worlds outside of our solar system
for thousands of years but the first
confirmed existence of an exoplanet
orbiting a sun-like star only occurred
in 1995 ever since about 4000 exoplanets
have been confirmed by multiple
discovery methods with about 3,000 more
awaiting verification according to one
theory at least one exoplanet forbids
each star in the Milky Way this would
place the exoplanet count in our local
galaxy to about 1 trillion the search
for exoplanets continues not just to
create a catalogue of known world but
also to see if life may exist elsewhere
in the universe astrobiologists closely
study the size composition and location
of exoplanets relative to their stars to
see the likelihood of organisms thriving
in an environment other than Earth who
knows what discoveries these new worlds could bring
countless worlds scattered throughout
Kells galaxies challenge the notion that
we are alone in the universe
[Music]
exoplanets are worlds that exist outside
of our solar system also known as
extrasolar planets these bodies often
orbit their own stars with some being a
part of entire planetary systems
exoplanets are made of the same elements
as the worlds in our solar system and
based on their composition and
structures are just as diverse some
known as giant or neptune-like planets
are large gaseous worlds other gas
giants called hot Jupiters closely orbit
their stars causing the planets to have
high surface temperatures another
category of exoplanets consists of super
Earths smaller than the gas giants but
larger than Earth super Earths are
terrestrial and made primarily of rocky
or icy material the final category
includes earth analogs much as their
name implies earth analogs are similar
to earth in various ways including size
composition and distance to their home
star exoplanets are difficult to detect
directly mostly because they are
outshined by the Stars the orbit
to circumvent this about five primary
methods have been developed to find
these planetary bodies including radial
velocity in which a planet causes a star
to wobble direct imaging where the glare
of stars is blocked in order to see
objects nearby astrology which observes
the Stars movements in relation to
nearby stars gravitational microlensing
which observes the light of a star being
bent by a planet’s gravitational pull
and the most prolific form of finding
exoplanets transit the method in which a
planet passes between its star and earth
thereby dimming its star’s light
[Music]
scientists have suspected the existence
of worlds outside of our solar system
for thousands of years but the first
confirmed existence of an exoplanet
orbiting a sun-like star only occurred
in 1995 ever since about 4000 exoplanets
have been confirmed by multiple
discovery methods with about 3,000 more
awaiting verification according to one
theory at least one exoplanet forbids
each star in the Milky Way this would
place the exoplanet count in our local
galaxy to about 1 trillion the search
for exoplanets continues not just to
create a catalogue of known world but
also to see if life may exist elsewhere
in the universe astrobiologists closely
study the size composition and location
of exoplanets relative to their stars to
see the likelihood of organisms thriving
in an environment other than Earth who
knows what discoveries these new worlds could bring
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