<story><title>Chandrayaan-2 Update: Lunar Orbit Insertion</title><url>https://www.isro.gov.in/update/20-aug-2019/chandrayaan-2-update-lunar-orbit-insertion</url></story><parent_chain><item><author>swatkat</author><text>Here&amp;#x27;s a nice orbit simulation for Chandrayaan-2 mission: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;sankara.net&amp;#x2F;chandrayaan2.html&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;sankara.net&amp;#x2F;chandrayaan2.html&lt;/a&gt;</text></item></parent_chain><comment><author>thunderbong</author><text>The multiple loops are not for gravity assist (or gravitational slingshot [0]) as I had initially thought. It is for the Oberth Effect [1], which I only got to know of today.&lt;p&gt;From the Wikipedia article -&lt;p&gt;&amp;gt;&amp;gt; Oberth maneuver, is a maneuver in which a spacecraft falls into a gravitational well, and then accelerates when its fall reaches maximum speed. The resulting maneuver is a more efficient way to gain kinetic energy than applying the same impulse outside of a gravitational well.&lt;p&gt;&amp;gt;&amp;gt;  In some cases, it is even worth spending fuel on slowing the spacecraft into a gravity well to take advantage of the efficiencies of the Oberth effect.&lt;p&gt;Fascinating! To say the least!&lt;p&gt;[0]: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Gravity_assist&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Gravity_assist&lt;/a&gt;&lt;p&gt;[1]: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Oberth_effect&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Oberth_effect&lt;/a&gt;</text></comment>
<story><title>Chandrayaan-2 Update: Lunar Orbit Insertion</title><url>https://www.isro.gov.in/update/20-aug-2019/chandrayaan-2-update-lunar-orbit-insertion</url></story><parent_chain><item><author>swatkat</author><text>Here&amp;#x27;s a nice orbit simulation for Chandrayaan-2 mission: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;sankara.net&amp;#x2F;chandrayaan2.html&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;sankara.net&amp;#x2F;chandrayaan2.html&lt;/a&gt;</text></item></parent_chain><comment><author>bdamm</author><text>It&amp;#x27;s a really nice tool, I had several ah-hah moments!&lt;p&gt;Does anyone know what the teleportation glitch is right at Lunar capture?</text></comment>