Exoplanets: the cosmic context Sprial Galaxy NGC 1352 Sprial Galaxy - - PowerPoint PPT Presentation

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Exoplanets: the cosmic context Sprial Galaxy NGC 1352 Sprial Galaxy - - PowerPoint PPT Presentation

Mar 05, 2024 211 likes •639 views

Exoplanets: the cosmic context Sprial Galaxy NGC 1352 Sprial Galaxy NGC 1352 100,000 light years Sprial Galaxy NGC 1352 100,000 light years billions of stars in a 1000 ly radius every star we see at night is in the Milky Way The surface of a

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Exoplanets: the cosmic context

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Sprial Galaxy NGC 1352

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Sprial Galaxy NGC 1352

100,000 light years

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Sprial Galaxy NGC 1352

100,000 light years

billions of stars in a 1000 ly radius

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every star we see at night is in the Milky Way

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The surface of a planet is good place for life to...live

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a nearby star provides energy; atmosphere and water may be key ingredients

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Curiosity rover on Mars

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Jupiter’s moon Europa: salt-water oceans

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How common are habitable worlds?

Artist’s rendition: Lynette Cook

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Galactic context for planets and life

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Dense, cold clouds of gas and dust

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Eagle Nebula (10s of light years across)

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Star (and planet?) formation

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“Debris disk” around the young star beta Pictoris

note: coronograph image; direct light from the star is physically blocked in front of the telescope

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What is a planet?

break: mass limits on blackboard...

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“Debris Disk” around the young star beta Pictoris

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Our Solar System (sizes to scale)

Inner, terrestrial, planets: small, close together, rocky and metallic Outer, Jovian, planets: large, spread out, gaseous

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Coplanar, most angular momentum vectors are aligned

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Nebula collapsing under its own gravity -- spins faster – is is flattened into a disk

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How common are other planetary systems? What properties do they have? How can we detect them and measure their properties?

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Planets (and moons) shine by reflected sun/star-light

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Direct imaging

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Fomalhaut b - is it a planet?

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Center of mass: common orbital motion

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Radial velocity method

we’ll discuss this later...

iron lithium calcium

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Venus transiting the Sun

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Kepler Mission (2009)

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Some early Kepler results

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