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Team D:Kaniesha Stern
Charles Ammon Jowers IIITracy 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:
P2=a3
• 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
0.24
0.62
1.0
1.88
11.86 29.46
84.0 164.8
4.23
51 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 star Sun Hot star
Temperature:
4,000 K 5,777 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 ScienceNorman Freed-Dean of Eberly College of
ScienceMs. Jody Markley -UBMS DirectorMr. Derek James -UBMS Assistant DirectorSuvrath Mahadevan -Assistant ProfessorArpita Roy -Research AssistantMr. Eric Speight –Teacher
AND….
All the UBMS Staff and Faculty