         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"
+      figure_credits: "Image Credit: H. Giguere, M. Giguere"
 
   }
 

      text: """
        <p>The transit method is a very simple and effective method for discovering planets, but it is not the only one used by astronomers. Let’s have a look at some of the other methods:</p>
        <strong>THE RADIAL VELOCITY METHOD</strong>
        <p>As a planet orbits a star its gravitational pull moves the star around. Therefore at some points the star is moving towards us (the observer) and at other points it is moving away from us. We can measure the speed of this movement by looking at the spectrum of light from the star. When moving towards us the star’s light becomes more blue, and when moving away its light becomes more red. The faster the star is moving, the more massive the planet. For example, Jupiter moves the Sun at 12.7 m/s (slightly faster than Usain Bolt can run), whereas the effect from Earth is over 100 times smaller, making it much easier to detect larger planets.</p>
        """
      figure: "./images/mini-course/slide-16.jpg"
      figure_credits: "NASA"

  }


        The first ever confirmed exoplanet was not actually discovered orbiting a Sun-like star. It was found around an object known as a pulsar. Pulsars are the extremely dense, rapidly spinning cores of dead stars which have beams of radiation that sweep out like an interstellar lighthouse. The rotation-rate of pulsars is extremely reliable and can be measured to very high accuracy. However, if a planet in in orbit its gravitational pull on the pulsar will manipulate the rotation-rate in a way that allows its existence to be inferred.
        """
      figure: "./images/mini-course/slide-19.gif"
      figure_credits: "Image credit: Cambridge Physics"

  }

