bright white light that exploded into a green light and small tendrils coming down to groundbright white light on western horizon just south of mount monadnock. thought it was venus. it appeared to bright and kept my attention for next hour or so. left colebrook NH for Newport Vt at about 20:15-20:30 and noticed light appeared to be moving slowly towards my location. thought maybe it was border patrol helo because of its movements and location. as i was south bound on U.S Route 3 it was very obvious object was moving towards my location. i continued to look occasionally at it and then it exploded into green light that illuminated the Conn river valley on both NH and VT sides. Passenger with me was very scared and insisted that we go home.((NUFORC Note: Date is approximate. PD))