Team D: Kaniesha Stern Charles Ammon Jowers III Tracy Diggs

 Exo means outside of and Planet means Wanderer  Exoplanets are planets outside of our solar system  Alex Wolszczan discovered the first exoplanet  51 Peg was the second exoplanet discovered  Kepler Satellite Mission  450 exoplanets have been confirmed

 Find habitable Planets  Find signs of other life forms  What else may we find in the universe

Kepler’s First Law: The orbit of every planet is an ellipse with the sun at one of its foci Kepler’s Second Law: P 2 =a 3 Kepler’s Third Law: A planet moves the fastest when it’s closest to a star and Slowest when its furthest away from it’s star

Peg Introduction of Our Solar System

 Transit detection is a way of discovering Exoplanets by viewing them at the moment of an eclipse  Imaging is another way of discovering exoplanets by using a camera to take a picture

 Radial Velocity is used to determine Doppler Shift  Doppler effect is the shift in frequency and wavelength of a wave  Spectrographs are used for this method

Wien’s Law states that hotter bodies emit at shorter wavelengths, and a higher frequency; cooler bodies emit at longer wavelengths and a lower frequency If a body emits in the blue, would you expect it to be hotter or colder than a body that emits in the red? Object:Cool starSunHot star Temperature: 4,000 K5,777 K 50,000 K

 There are five variables that we used to describe planetary orbits, which are: Mean Anomaly Mass Period Eccentricity Longitude of Periastron

 Spectroscopy  interaction of matter and radiation.  Spectrographs  instruments designed to perform spectroscopy, by dispersing light.  Emission Lines  Absorption Lines

 Behaviors of Light  Refraction  Reflection  Diffraction

Earth has a blue sky and green grass … Why is the sky blue? Answer: The sky scatters more blue light than it does red light

 Different Types of Grass  Acetone  (CH3)2CO  Spectrograph  Measured what would appear on the absorption spectrum Why is the grass green? Answer: Chlorophyll reflects yellow and green light infrared light; but absorbs blue and red light

 Red edge is the signature of vegetation on earth  Astronomers will look for red edge on other planets to see if they may have life — Image courtesy NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington Red Edge and How it can be used to detect life?

 Search for life outside of our Solar System has begun  Besides Earth, there is no life on other planets in our Solar System  Radial Velocity and Doppler effect, Transit Detection and Imaging are detection methods used to discover exoplanets  Red edge is a signature of life on a planet, a characteristic that our planet has ; which will allow astronomers to find life on other planets.

SEECoS and the Eberly College of Science Norman Freed-Dean of Eberly College of Science Ms. Jody Markley -UBMS Director Mr. Derek James -UBMS Assistant Director Suvrath Mahadevan -Assistant Professor Arpita Roy -Research Assistant Mr. Eric Speight –Teacher AND…. All the UBMS Staff and Faculty