Hi Serg-check and see if you see the object in same place or near there again on next night-it may be a star, more likely a planet if it doesn't "twinkle"- the disappear and re-appear is caused by hi level clouds which momentarily cover up the star or planet (these clouds are often not visible if not illuminated by a strong light source such as the moon) If you see it again try to identify what constellation it is in or near and you should be able to identify which star or planet it could be-if it stays in same place it could be Polaris (North Star)
But if it not ...there is no way we could say what it might be. I have seen many so called "nocturnal lights" but they usually are mundane things such as satellites, high flying aircraft, stars and planets etc. But the fact you are looking and seeing is good! :)