Transcript Life on hot Jupiters

Life on hot Jupiters
Information about Hot Jupiters
• Hot Jupiters are a class of
extrasolar planets whose
mass is close to or
exceeds that of Jupiter
(1.9 × 1027 kg), but unlike
in our own solar system
the planets referred to as
Hot Jupiters orbit within
approximately 0.05 AU of
their parent stars. In
comparison, a Hot Jupiter
is about eight times closer
to its star than Mercury is
to the Sun.
Information about Hot Jupiters
• Hot Jupiters have some
common characteristics:
• They have a much greater
chance of transiting their
star as seen from Earth
than planets of the same
mass in larger orbits.
• They are all thought to
have migrated to their
present positions because
there would not have been
enough material so close
to the star for a planet of
that mass to have formed
in situ.
Data about Exoplanet
What is life?
• What is life? Does this sound like a
strange question to you? Of course
we all know what is meant by the
word "life", but how would you define
it?
• Even the biologists have a tough time
describing what life is! But after many years of
studying living things biologists have
determined that all living things do share some
things in common:
1) Living things need to take in energy
2) Living things get rid of waste
3) Living things grow and develop
4) Living things respond to their environment
5) Living things reproduce and pass their traits
onto their offspring
6) Over time, living things evolve (change slowly)
in response to their environment
Suitable Life on hot Jupiters
• "Water's at the top of the
shopping list of ingredients for
life," says Hugh Jones of
Liverpool John Moores
University .
• Spitzer, a space-based infrared
telescope, obtained the detailed
data, called spectra, for two
different gas exoplanets. Called HD
209458b and HD 189733b, these socalled "hot Jupiters" are, like Jupiter,
made of gas, but orbit much closer
to their suns.
• The data indicate the two planets
are drier and cloudier than predicted.
Theorists thought hot Jupiters would
have lots of water in their
atmospheres, but surprisingly none
was found around HD 209458b and
HD 189733b. According to
astronomers, the water might be
present but buried under a thick
blanket of high, waterless clouds.
• Therefore it is possible for Hot
Jupiters to have life. These life
maybe look like jellyfish,
cuttlefish or some balloon
object.
• Or even water life can be
present.
How the Life live in the hot Jupiters
It is used to
flow on the
cloud or swim in
the water.
Provide a large
surface area to
adsorb heat.
Some root like tentacle —
For catching food and
holding companion with
each other.
• Perhaps these life can flow on the
cloud or swim in the water freely and
happily, they can live using the heat
released by the star nearby as food
or energy. They use the water vapor
as raw material for growth and
replicate themselves easily and
randomly by movement of star.
How the Life live in the hot Jupiters
• Life in hot jupiters can make
use of the nuclear power,
thermal energy or sun light to
survive. They make use of these
energy to move.
Conclusion
• Until now, the only planets for which
spectra were available belonged in our
own solar system. The planets in the
Spitzer studies orbit stars that are so far
away, they are too faint to be seen with
the naked eye. That means both planets
are at least about a million times farther
away from us than Jupiter. In the future,
astronomers hope to have spectra for
smaller, rocky planets beyond our solar
system. This would allow them to look for
the footprints of life -- molecules key to the
existence of life, such as oxygen and
possibly even chlorophyll.