Answer
Sometimes people report seeing objects in the sky that they are unable to identify as any known celestial body. There are many such phenomena that may not be easily understood without proper study of astronomy or related fields.
If one is genuinely interested, one may consult experts in those subjects or refer to authentic scientific literature. However, as devotees, we should not unnecessarily waste our mental energy on speculative concerns.
Ultimately, Krishna is in control of everything. As His devotees, we are protected by Him, and there is no need to be overly anxious about unknown phenomena such as UFOs or similar speculations, or to constantly worry about what might happen in the external world.
Our focus should remain on performing our prescribed duties and practicing Krishna consciousness sincerely. By cultivating devotion and remembrance of Krishna, one becomes situated in His protection and steadily progresses back to Him.
Therefore, rather than being disturbed by uncertainties about the universe, one should simply continue one’s duties and steadily engage in Krishna consciousness with faith and determination.