Can I use a laser pointer for astronomy? Green laser pointers are useful astronomical tools. On public astronomy nights, the narrow beam from the laser pointer can be used to unambiguously point to celestial objects. The beam is bright and clearly visible for several reasons: typical green laser pointers deliver at least 5 milliwatts (mW) of power.
Is it illegal to point laser in the sky UK? Pointing the dazzling beams at all forms of transport will be made illegal, amid fears the activity could prove deadly. People shining laser pens at pilots or drivers face hefty fines or even prison under tough new powers to combat the threat.
Are Class 4 lasers legal in the UK? There is no upper restriction on output power. Class 4 laser products are capable of causing injury to both the eye and skin from direct exposure and reflections also may be hazardous.
What color laser is best for astronomy? Green laser pointers seem to be the preferred colour for astronomy as they are mainly used during the night. They are quite bright without using too much power, while a red or blue laser would require much more power just to reach the same level of brightness.