1 / 25

Exploring Life in the Solar System and Beyond: Detection Methods and the Drake Equation

Join us for an engaging discussion on the possibilities of life in our solar system and beyond. We'll explore the arguments supporting life as a high probability, including the quick emergence of organic molecules on Earth and the potential for life on icy moons like Europa. Learn about current detection methods for extrasolar planets, including the Doppler method and transits. Participate in our web lecture before the discussion section for extra credit opportunities and prepare for the final exam set for May 9. Don’t miss this chance to deepen your understanding of life in the galaxy!

sugar
Télécharger la présentation

Exploring Life in the Solar System and Beyond: Detection Methods and the Drake Equation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Bit of Administration …. • Washburn Observatory • Wednesday, after dusk for a few hours • Reading • Chapter 24, Chapter 14 recommended • Discussion Section • Web-lecture in advance of section • 2 pts extra credit for evaluation • 3 pt extra credit quiz • responsible for material • Final • Sunday, May 9, 12:25-2:25, B102 Van Vleck

  2. Life in the Solar System • Arguments for Life as High Probability • Organic molecules form easily • Life occurred quickly on Earth - < 3.85 billion years • Life can exist in a wide range of conditions

  3. Life in the Solar System • Life on Europa ? • Icy crust • Tidal heating Liquid oceans Volcanic vents

  4. Extrasolar Planets Life in the Galaxy • Key Idea - With present technology, cannot “see” • an extrasolar planet due to • small angular separation and faintness • - Observing effects of planet ON star • Detection Methods • Doppler Method - most productive - 110 planets! • Radial-velocity variations (discussion section) • Astrometric • Angular motion of star in the sky • Planetary Transits • Eclipses • Gravitational Lenses

  5. Extrasolar Planets

  6. Extrasolar Planets

  7. Current Detection Limit

  8. Extrasolar Planets

  9. Extrasolar Planets Orbital Period 3.5247 days Semi-major axis 0.0468 AU Mass > 0.69 MassJup

  10. Life in the Galaxy • Drake Equation • Nciv = N* x fp x fe x fl x fc x flifetime Lib Con N* Solar-type stars in galaxy 1011 1011 fp Fraction of stars which have planets 1 0.1 fe Fraction that are earth-like (suitable for life) 1 0.01 fl Fraction on which life actually arises 1 0.01 fc Fraction that can and choose to communicate 1 0.01 1011 104 fl Survival time of civilization/age of galaxy 10-8 10-8 100 yr/1011 yr 1000 10-4 If 1000 civilizations, on average 100 ly apart

More Related