Lovely crack head

1234567
Across
  1. 1. hole / just the dark hole in the space.
  2. 3. / second planet in solar system.
  3. 5. / is a Japanese manga series written and illustrated by Masashi Kishimoto.
  4. 6. / a planet in Solar system, closest to the sun.
Down
  1. 2. / an organelle in the cytoplasm of eukaryotic cells containing degradative enzymes enclosed in a membrane.
  2. 4. matter / a hypothetical form of matter thought to account for approximately 85% of the matter in the universe.
  3. 7. / the basic structural, functional, and biological unit of all known organisms.