On April 27, the moon blocked 23 percent of the sun in a partial eclipse, but it was not possible to see this from Earth.

These orbits, commonly referred to as xGEO, extend beyond Earth-centered orbits that have an orbital period matching ... to complete a fully successful moon landing in early March.

The Russian orbital service station (ROSS) will become an evolutionary step in the program to explore the Moon and fly to Mars ... on its maintenance in the period when the new orbital station ...