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In this video of the Russian Burevestnik rocket launch (uses nuclear power)

1) What is that light spot moving backwards (contrary to the rocket trajectory, backwards towards the launch fixtures):

enter image description here
enter image description here

Is it just some optical illusion or something more fundamental and always present?

2) Why are the engineers at the missile factory wearing masks/respirators? Is it to protect themselves, or is an extra-clean atmosphere required at that installation facility?

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  • $\begingroup$ This is also the Cruise Missile's starter motor. It if goes "nuclear ramjet" it wouldn't have a fiery tail like that. One would also want to err... stay safely away to avoid "direct shine". (How do you stop it btw? Eject the core over the ocean?). $\endgroup$ – David Tonhofer Feb 17 at 19:56
  • $\begingroup$ It would probably be a good idea to rephrasee the question slightly to make it about a video of an "allegedly nuclear powered missile" launch. The question can be answered without discussing the premise that the missile is what it was claimed to be in the video. (A premise that is debatable given the known technological difficulties associated with such a missile.) $\endgroup$ – user2705196 Feb 18 at 18:20
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1) This is a lens flare (as uhoh notes) - a reflection of the bright light inside the lens of the camera. Essentially, it is an image of the bright rocket exhaust, mirrored at the center of the lens. That't why it's moving backwards.

2) The outfit of the workers seems to be quite standard for any (basic) clean-room environment to prevent any contamination of the environment with any bits and pieces of the human body (hair, pieces of skin, droplets of spit, bacteria..). More or less the same outfit is worn in any modern food processing plant.

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