     material:
       title: "Planet Hunters 2b"
       text: """
-        PH2b is the second planet discovered by volunteers on Planet Hunters. It is a Jupiter-sized, gas giant planet in orbit around a star very similar to our Sun. It’s orbit is only 17% smaller than that of the Earth, putting it in a region known as the habitable zone, the distance from a star where the conditions may be right for life. You will learn more about the habitable zone later. Below is an artist’s impression of the view from a hypothetical habitable moon in orbit around PH2b
+        PH2b is the second planet discovered by volunteers on Planet Hunters. It is a Jupiter-sized, gas giant planet in orbit around a star very similar to our Sun. It’s orbit is only 17% smaller than that of the Earth, putting it in a region known as the habitable zone, the distance from a star where the conditions may be right for life. You will learn more about the habitable zone later. Below is an artist’s impression of the view from a hypothetical habitable moon in orbit around PH2b.
         """
       figure: "./images/mini-course/10-2b.png"
       figure_credits: "NASA"

      title: "What can we learn from a lightcurve? (Part 2)"
      text: """
        <p>
          The other most important piece of information a transit lightcurve gives us is an estimate of the size of the planet. The larger the planet is in relation to the star, the more light is blocked by the planet and the deeper the transit. So the transit depth, d, is proportional to the radius of the planet,
        </p>
        <div style=\"text-align: center;\">
          <img style=\"width: 75px; padding: 20px\" src=\"./images/mini-course/transit-depth.png\"/>
        </div>
        """
      figure: "./images/mini-course/lightcurve-transit-depth.png"
      figure_credits: ""

    material:
      title: "False-positives - Eclipsing binary stars"
      text: """
        <p>The way that the lightcurves are produced means that sometimes light from other stars (not just the target star) is included. This is called ‘blending’, and it leads to the light of the target being diluted. This means if the target is an eclipsing binary, the dips in light may appear small enough to mimic a planet. </p>
        <p>Also, if one of the background stars is actually an eclipsing binary it may appear like there are smaller transits occurring on the target star, when in fact there is nothing there at all. The right-hand panel of the diagram below shows an example of this scenario.</p>
        """
      figure: "missing"
