 The Hubble Space Telescope , which cannot be pointed directly at the Sun , used the Moon as a mirror to study the light that had passed through the atmosphere of Venus in order to determine its composition . This will help to show whether a similar technique could be used to study exoplanets . 
 The Hubble Space Telescope , which cannot be pointed directly at the Sun , used the Moon as a mirror to study the light <a href='null_relcl' title='1'><mark>that</mark></a><a href='been_done' title='2'><mark>had</mark></a> passed through the atmosphere of Venus in order to determine its composition . This will help to show whether a similar technique could be used to study exoplanets . 
The Hubble Space Telescope , which cannot be pointed directly at da Sun , used tdaMoon as a mirror to study the light done passed thru the atmosphere of Venus in order to determine its composition . This will help to show whether a similar technique could b used to study exoplanets .