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<!DOCTYPE html>
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<head>
<title>Exploratory Data Analysis - Kepler Object of Interest Dataset</title>
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# Exploratory Data Analysis
## Kepler Object of Interest Dataset
<img src="https://cdn.mos.cms.futurecdn.net/iVhkhdsWa2cWhqaDqWr4rC.jpg"/>
Github Repo: [https://github.com/JamesMcGuigan/dataset-kepler/](https://github.com/JamesMcGuigan/dataset-kepler/)
---
# KOI - Kepler Objects of Intrest
<table style="width: 100%">
<tr>
<td>
<table style="text-align: left">
<tr><td>Number of KOIs</td><td>9564</td></tr>
<tr><td>Number of Solar Systems</td><td>8214</td></tr>
<tr><td>Number of Named Planets</td><td>2305</td></tr>
<tr><td> </td></tr>
<tr><td>CONFIRMED KOIs</td><td>2303</td></tr>
<tr><td>CANDIDATE KOIs</td><td>2420</td></tr>
<tr><td>FALSE POSITIVE KOIs</td><td>4841</td></tr>
</table>
</td>
<td>
<img src="./images/KOI_Disposition_PieChart.png"/>
</td>
</tr>
</table>
# Named False Positives
[Kepler-469b](https://twitter.com/exohugh/status/1169262460504875008) - "clearly a binary fold in the wrong period" - Hugh Osborn
[Kepler-503b](https://arxiv.org/abs/1805.08820) - An Object at the Hydrogen Burning Mass Limit Orbiting a Subgiant Star
---
# FastAI - Neural Network Predictions
Using a FastAI Neural Network to predict KOI Disposition (CONFIRMED / CANDIDATE / FALSE POSITIVE)
from the other fields in the dataset,
NN Config: `layers=[200, 200, 100, 100, 50, 50] weight_decay=0.1 dropout=0.5`
<table>
<tr>
<td>
<ul>
<li>
Only using <code>fpflags</code> and OneHot encoded <code>koi_comments</code>
</li>
<li>83.3% accuracy</li>
<li>20 <code>fit_one_cycle()</code> epocs</li>
</ul>
<img src="images/FastAI_Training_Loss_1.png" height="262" width="386"/>
</td>
<td>
<ul>
<li>
Using entire dataset
</li>
<li>89.6% accuracy</li>
<li>Superconvergence</li>
<li>5 <code>fit_one_cycle()</code> epocs</li>
</ul>
<img src="images/FastAI_Training_Loss_2.png" height="262" width="386"/>
</td>
</tr>
</table>
---
# Exoplanet Habitability
A key goal of the Kepler Space Telescope is to determine how many Earth-size and larger planets there are in or
near the habitable zone (often called "Goldilocks planets") of a wide variety of spectral types of stars.
The Goldilocks Zone:
- Liquid Water = surface temperature between 273.2K - 373.2K
- Earth Sized Rocky Planet = assumed between 0.8 - 1.7 (Earth Radii)
**17 potentially habitable exoplanets found!**
<table style="width: 100%; text-align: center">
<tr>
<td>
KMeans Clustering for Planet Type
<img src="images/Exoplanet_StarType.png" width="375"/>
</td>
<td>
KMeans Clustering for Star Type
<img src="images/Exoplanet_PlanetType.png" width="375"/>
</td>
</tr>
</table>
---
# Where are my habitable exoplanets?
The 17 potentially habitable exoplanets plotted on the night sky!
<table>
<tr>
<td>
<img src="https://www.nasa.gov/sites/default/files/styles/full_width_feature/public/thumbnails/image/milkyway-kepler-croberts-1-full_0.png" width="300"/>
</td>
<td>
<img src="images/Exoplanet_Starmap.png" width="500"/>
</td>
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</table>
- The bottom right of the grid is closest to the Galactic Rim, thus has a greater overall star density
- Each square represents the stationary field of view of the Kepler Space Telescope
- Kepler was repointed 21 times in a grid search pattern during its 9 year mission
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