Need Help With A Particle System?

I want to recreate the comets from the sky in the first few seconds of this video https://www.youtube.com/watch?v=E5J6Vmcr1j4 I don’t need them to do anything apart from being animated in the sky with the particle effect coming off the back. I’d assume this would be done with a particle effect but if someone knows a different way that would be great.