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Eamonn Kerins<p>One method is <a href="https://astrodon.social/tags/microlensing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>microlensing</span></a>. <a href="https://astrodon.social/tags/Einstein" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Einstein</span></a> in his <a href="https://astrodon.social/tags/Theory" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Theory</span></a> of <a href="https://astrodon.social/tags/GeneralRelativity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GeneralRelativity</span></a> predicted that light can be deflected by <a href="https://astrodon.social/tags/gravity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>gravity</span></a>. Microlensing is a great way to find cool <a href="https://astrodon.social/tags/planets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>planets</span></a> that orbit further out from their <a href="https://astrodon.social/tags/HostStar" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HostStar</span></a> than those that can be seen with the <a href="https://astrodon.social/tags/TransitMethod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>TransitMethod</span></a>. We can spot a number of these <a href="https://astrodon.social/tags/signals" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>signals</span></a> each year by monitoring hundreds of millions of <a href="https://astrodon.social/tags/stars" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>stars</span></a> every 15 minutes or so for several months per year. That's a lot of <a href="https://astrodon.social/tags/data" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>data</span></a> to process, but <a href="https://astrodon.social/tags/computers" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>computers</span></a> are fast these days. (3/n)</p>
Eamonn Kerins<p>Currently we know of more than 5000 <a href="https://astrodon.social/tags/exoplanets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>exoplanets</span></a> <a href="https://astrodon.social/tags/discovered" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>discovered</span></a> using a variety of techniques and survey instruments. So far most have been found using the <a href="https://astrodon.social/tags/TransitMethod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>TransitMethod</span></a> where we look for tiny dips in <a href="https://astrodon.social/tags/starlight" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>starlight</span></a> as one of its <a href="https://astrodon.social/tags/planets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>planets</span></a> passes in front of it. However this method tends to more easily pick out planets that are large (like <a href="https://astrodon.social/tags/Jupiter" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Jupiter</span></a>) and close in to their <a href="https://astrodon.social/tags/HostStar" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HostStar</span></a> - making them <a href="https://astrodon.social/tags/HotJupiters" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HotJupiters</span></a>. We have no planets like that in our <a href="https://astrodon.social/tags/SolarSystem" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SolarSystem</span></a>, but there are other methods we can use. (2/n)</p>
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