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Proposal

Proposal. The Transit Method. What is a exoplanet ?. An exoplanet or exo -solar planet is a planet that orbits another star from ours. We can find them by using The transit method. A transit occurs when a planet passes over its sun.

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Proposal

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Presentation Transcript

  1. Proposal

  2. The Transit Method What is a exoplanet? • An exoplanet or exo-solar planet is a planet that orbits another star from ours We can find them by using The transit method. A transit occurs when a planet passes over its sun

  3. The shadow cast by the orbiting planet blocks some of the light being emitted by the sun. The shadow cast on the star could be big or small. The size of this shadow tells us a great deal.

  4. How big the Planet is • We used the equation 8.94² /the drop in brightness for that particular planet. This gave us the radius of the planet. • To work out the volume we used the equation:4/3 pi r³

  5. The habitable zone For these planets the Goldilocks zone is 0.108au-0.232au. We calculated the inner edge by doing the square root of 0.024 x 0.7=0.108 For the outer edge it’s the square root of 0.024 x 1.5 =0.232

  6. Planets atmosphere • We need Oxygen for respiration as this provides us with the energy to form the basic bodily functions. We need Carbon Dioxide and water  for trees to convert carbon dioxide and water into Oxygen and Glucose during photosynthesis. This oxygen is then used by the animals and the exhaled carbon dioxide and water vapour as a waste product. Once again the trees take in the carbon dioxide and water to produce oxygen and glucose. This cycle is constantly ongoing and is needed for animals and plants to survive. We also need carbon dioxide in our atmosphere to reflect heat. This CO2 is reflecting the heat that comes from the Earth itself. If there was no carbon dioxide in the atmosphere there would be less heat reflected and the average global temperature would drop dramatically. There probably wouldn’t be any liquid water if there was no carbon dioxide in the atmosphere. The absorption lines of the spectrum can show this. Each of the elements has a different colour on the spectrum. This is how you can tell what types of gases are in the atmosphere of a planet.

  7. Density and Gravity Score of the Planet • To work out the density we used the equation density= mass/volume ( we had previously calculated and shown in a different slide) • To work out the gravity score we used the formula m/r² • This is needed to know because I think that too little gravity will cause your muscles to waste away. I think that this is because you body originally used you muscles to move and work against the forces of gravity. This ” exercise” is what made your muscles stronger and bigger. But when there is very little gravity your muscles are not needed as much. This causes them to waste away. Also, all some of the blood from your legs rushes to the upper half of your body under the influence if gravity. This means that there will be high blood pressure in the upper half of your body which causes you brain to think that you are making too much blood, so the amount of blood you make drops. • Too much gravity could cause the smallest of movements to becomes a movement which needs a days worth of energy, this may be just lifting you neck, walking, even breathing! Also your heart has to beat much harder  which causes huge strain on you heart which could lead to heart problems. Also you actually become smaller! The elastic tissue is compressed so you decrease in height

  8. Why? • We think we will need to visit exoplanets to find life outside our solar system and natural resources as the Earth is rapidly running out of them • WE think that exoplanet BML-0798b is the most likely exoplanet to hold life as it is in the goldilocks zone , It has enough gravity to hold onto its atmosphere. It is also not too close, or too far away from the sun

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