Our team is passionate about space exploration, science and technology. We have been part of space exploration from the very beginning and we continue to lean forward in defining infinite possibilities for our customers to solve their toughest problems as we build the future of space.
The Earth \"rose\" because the spacecraft was traveling over the Moon's surface. An earthrise that might be witnessed from the surface of the Moon would be quite unlike moonrises on Earth. Because the Moon is tidally locked with the Earth, one side of the Moon always faces toward Earth. Interpretation of this fact would lead one to believe that the Earth's position is fixed on the lunar sky and no earthrises can occur; however, the Moon librates slightly, which causes the Earth to draw a Lissajous figure on the sky. This figure fits inside a rectangle 1548' wide and 1320' high (in angular dimensions), while the angular diameter of the Earth as seen from Moon is only about 2. This means that earthrises are visible near the edge of the Earth-observable surface of the Moon (about 20% of the surface). Since a full libration cycle takes about 27 days, earthrises are very slow, and it takes about 48 hours for Earth to clear its diameter. During the course of the month-long lunar orbit, an observer would additionally witness a succession of \"Earth phases\", much like the lunar phases seen from Earth. That is what accounts for the half-illuminated globe, the ashen glow, seen in the photograph.
The Space Policy Program engages in research and issues public policy recommendations on national space policy and international cooperation in space. The program also sponsors STEM advances in support of the space program. It serves as a forum to convene experts from academia, government, industry and others and hosts workshops, international student exchanges, seminars and lectures covering the universe of space-related topics.
ELPHIC: Ah, the laser comm system is a whole new way of doing communications from deep space. It uses infrared laser light which has intrinsically just a lot more capacity to transmit information. In fact, it's the same thing that's used in fiber optics here on Earth to transmit broadband information on the Internet into your homes. So we're basically trying to get that capability into space so we can telemeter down things like HD imagery and huge volumes of data that we take of other planets. For LADEE, we're going to test it and see that it indeed works and really open the door to this possibility for future missions. 59ce067264