A Planet
Sometimes, planets shine very brightly. A slight haze or cloud may make the shine look larger, and the moving clouds make it seem as if the light is moving. This is usually the cause of many UFO sightings.
A Meteor
Meteors when they hit the atmosphere will burn up with a dazzling light that can occasionally be seen from the ground.
A Cloud
Lenticular clouds have solid, round-edged formations, which look like a spaceship Noctilucent clouds can catch the last rays of the setting sun and glow brightly in the night sky and can be very easily mistaken for a UFO.

Lenticular Clouds © Fortean Picture Library
Cloud Or Fog
Rays from the sun or moon can be distorted to make it look peculiar, sometimes moving.
Parhelia (Sun Dogs Or Mock Suns)
Parhelia are reflections from the sun on small ice fragments, making it look like there are more glowing balls with the sun. Even clouds can reflect light from our streetlights or headlamps.
Aurora
Charged particles from the sun can result in shining sheets of light as they blaze in the outer atmosphere.
Ball Lightning
This is a ball of glowing energy that can pass through windows and doors.
Earthlight
Rocks under immense pressure can emit energy or burning ionised gas which glows upon reaching the atmosphere.
Jets And Sprites From Thunderstorms
Jets and sprites shoot out from the crowns of thunder storms for up to 90 kilometres and at very high speeds.
Other misidentifications could be satellite, aircraft, birds or even kites.
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