Space!

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Across
  1. 3. This phenomenon causes various kinds of distortions in images produced by optical systems such as lenses
  2. 5. This telescope uses the transit method to find exoplanets
  3. 6. This type of nebulae scatter light with their clouds. They are alsosites of star formation
  4. 8. The medium separating the solar and interstellar media
Down
  1. 1. It got too close to the sun, but luckily didn't share Icarus's fate
  2. 2. Regions of very high magnetic fields on the sun which affect the temperature on the surface
  3. 4. These positions are the solutions to the restricted three-body problem, which are fixed in the center of mass frame (first word).
  4. 7. An astronomer made a list of objects so that he could avoid them, to find these objects in the sky