Each person non resident of the Russian Federation prior to applying for visa in the consulate must get an invitation according to the purpose of his or her visit.
Your Visa To Russia provides invitations for tourist and business trips.

Russians to take a giant leap for the space program


Russia is planning to put a man on the Moon, and anyone can apply to join the crew. The Russian Space Agency, Roscosmos, may have suffered some humiliating setbacks in recent months, but it’s hitting back by aiming even...

All Russia news »

Source: http://rt.com/news/moon-flights-russia-cosmonauts-361/