2018LifeOnOtherWorldsl
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This document summarizes a presentation titled "BIS 402 : LIFE BEYOND EARTH - First Contact – Discovery of Life Elsewhere 16 October 2018". The presentation discusses how Earth and our solar system have many unique characteristics that make life possible, such as Earth being the right distance from the sun, the stabilizing presence of Jupiter, and the size and orbit of the moon. It also discusses how exoplanets like those in the TRAPPIST-1 system or Jupiter's moon Europa may host life. The presenters aim to discuss first contact with life in a positive way and explore potential places life could exist beyond Earth.
2018LifeOnOtherWorldsl
- 1. BIS 402 : LIFE BEYOND EARTH First Contact – Discovery of Life Elsewhere 16 October 2018
- 2. YOUR PRESENTORS Jeff Duntemann Science Fiction Writer Editor Publisher http://www.contrapositivediary.com Don Doerres Professional STEM Mentor Rocket Scientist Science Fiction Writer https://www.slideshare.net/dondoerre s There really is a computer in here…really! There is a system to this…
- 3. VIEWPOINT If you are looking for a Dark and Dystopian First Contact Perspective you’ve come to the wrong place We’re into high adventure and positive outcomes
- 4. A FAIRLY UNIQUE PLACE 1 You are likely familiar with the term “Goldilocks planets” that are just the right size and just the right distance from the right kind of sun. They are “just right” for life as we know it. But there is more to it than that.
- 5. A FAIRLY UNIQUE PLACE 2 – SUN LOCATION The Sun is located at very special place in the galaxy, far from the center and between two arms. With a very small displacement, it would tumble into an arm, have a messy, unstable orbit, and likely a short life span Astron. Astrophys. 341, 81–85 (1999) ; Yes, the Sun is located near the corotation circle
- 6. A FAIRLY UNIQUE PLACE 3 – UNIQUE DISTRIBUTION OF PLANETS The arrangement of large and small planets in the solar system is surprisingly stable. Computer simulations show the stability has lasted for billions of years and can last for billions of years http://iopscience.iop.org/article/10.1086/3005 52/fulltext/
- 7. A FAIRLY UNIQUE PLACE 4 – LUCKY JUPITER Jupiter is just the right size and in just the right orbit to sweep up a lot of debris before it hits earth Jupiter and Saturn appear to stabilize each other, making our inner solar system a rare thing https://news.ucsc.edu/2015/03/wandering- jupiter.html
- 8. A FAIRLY UNIQUE PLACE 5 – STABLE EARTH Earth and Moon spin around each other and provide Earth with a very stable axial orbit Moon is far too big for a regular moon Could not be captured by Earth gravity Could not “bulge off” from an early cooling Earth Likely result of a planetary collision Or….is the Moon Earth’s stillborn twin????
- 9. A FAIRLY UNIQUE PLACE 6 - ATMOSPHERE Early on, Earth may have had a really thick atmosphere A possible planetary collision could have knocked most of the atmosphere away, leaving us with our breathable atmosphere rather than a crushing ocean of air https://www.space.com/23031-moon-origin- impact-earth-atmosphere.html
- 10. A FAIRLY UNIQUE PLACE 7 – MORE MOON FUN If the Moon were any bigger, the Earth would likely be tidally locked with the Moon, which means the Earth and the Moon would be showing fixed faces to each other. If the Moon were much smaller, it would be too small to stabilize Earth’s wobble.
- 11. A FAIRLY UNIQUE PLACE 8 – TECTONIC PLATES A possibility for the creation of tectonic plates is that the Moon carried away about a third of the Earth’s crust in its formation. Without the missing mass, plates would be evenly distributed and covered with water. Earth would be a water world. http://www.spacedaily.com/news/life- 01x1.html
- 12. EXOPLANETS Goldilocks planets or moons may be out there… Europa? www.space.com/27854-jupiter- moon-europa-amazing-photo.html TRAPPIST? www.nasa.gov/press- release/nasa-telescope-reveals-largest- batch-of-earth-size-habitable-zone-planets- around
- 13. THIS AND OTHER STERLING PRESENTATIONS CAN BE FOUND AT… https://www.slideshare.net/dondoerres