     material:
       title: "Kepler-90"
       text: """
-        The third confirmed exoplanet discovered by volunteers on Planet Hunters is in a system known as Kepler-90 and now has the designation Kepler-90h. This system already had six confirmed exoplanets, but the discovery of the seventh buy Planet Hunters volunteers made it the most populous planetary system known, apart from our own. The red circle in the diagram below shows the orbit of Kepler-90h in the system.
+        The third confirmed exoplanet discovered by volunteers on Planet Hunters is in a system known as Kepler-90 and now has the designation Kepler-90h. This system already had six confirmed exoplanets, but the discovery of the seventh buy Planet Hunters volunteers made it the most populous planetary system known, apart from our own. The red circle in the diagram above shows the orbit of Kepler-90h in the system.
         """
       figure: "./images/mini-course/11-kepler90.png"
-      figure_credits: "NASA"
+      figure_credits: ""
 
   }
 

      title: "False-positives - Variable stars"
      text: """
        <p>Not all changes in a star’s brightness are caused by transiting planets. There are a few other things we have to rule out first. These are called false-positives.</p>
        <p>Some stars intrinsically vary in brightness on a level that is comparable to that of a planetary transit. However, if the star is observed for a long period of time, the pattern of the variation can be easily differentiated from that of a planet transit. These variations normally happen over a much longer time than a planet transit (see example lightcurve below).</p>
        """
      figure: "./images/mini-course/5-FalsePositives.png"
      figure_credits: ""

      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 above shows an example of this scenario.</p>
        """
      figure: "./images/mini-course/slide-7.jpg"
      figure_credits: "Image credit: NASA/Wendy Stenzel"
