David Butler

2 old videos with fewer than 5,000 views from this channel.

Channel on YouTube

• Oldest
• Fewest views
• Random

• 1:04 Classroom Aid - Crab Nebula Pulsar

  David Butler

  3,267 views · 3 February 2017

• 1:39 Classroom Aid - Supernova Cassiopeia A and Light Echoes

  David Butler

  3,986 views · 27 June 2018