Do not aim directly at "stars", as some aircraft may look like stars from a distance. Better to go around it than leave the beam on it. Don't hold the pointer longer than you point to the star. It is generally illegal to point laser beams at aircraft. With one of a few exceptions, it is legal to aim a "laser-designator to send an SOS". Laser Pointers are becoming increasingly popular among astronomers. Astronomers around the world are adding high-power lasers to their toolkits, so it takes some time to provide tips on how to use laser Pointers safely.
Also, be aware of lasers purchased from other suppliers. Also, always wear laser goggles when using lasers and do not point the laser at other people, animals, vehicles, aircraft or reflective surfaces. This point cannot be stressed enough! First, the most obvious use for laser Pointers is pointing! You can use lasers to accurately show your friends the night sky, especially when talking to a group of people. Be sure to follow the safety tips below. Also, use only green laser pointer that are not "always on" (that is, laser Pointers that need to be pressed to work).