ALT Pictured from left to right in this photo are NASA Administrator James D. Fletcher, DeForest Kelley (who played Dr. “Bones” McCoy in the original Star Trek series), George Takei (Mr. Sulu), James Doohan (Chief Engineer Montgomery “Scotty” Scott), Nichelle Nichols (Lt. Uhura), Leonard Nimoy (Mr. Spock), Star Trek creator Gene Rodenberry, U.S. Rep. Don Fuqua (D.-Fla) and Walter Koenig (Ensign Chekov). They are posed in front of space shuttle Enterprise during its rollout ceremony on Sept. 17, 1976.

ALT A crescent Earth (bottom) and faint grey Moon (top left) are seen together in the blackness of space in this image taken by Voyager 1 on September 18, 1977. Credit: NASA/JPL

ALT A NASA camera aboard the Deep Space Climate Observatory (DSCOVR) satellite captured a unique view of the far side of the Moon as it moved in front of the sunlit side of Earth in this image taken in July 2015 from about 1 million miles from Earth. Credit: NASA

ALT A camera aboard Artemis I took this photo of the Earth and the Moon as they appeared on Day 13 of its mission as it reached 268,563 miles away from Earth. The Orion spacecraft appears in the foreground on the left. Credit: NASA

ALT The Artemis II astronauts captured this photo of a crescent Moon (left, foreground) and Earth (right) on April 6 of this year. Seen from behind the Moon, its surface appears in sharp detail in the foreground, while Earth sits much farther away, smaller and softly lit in the background. A faint reflection in the spacecraft window is also visible, subtly overlaying the scene. Though their phases differ, both are shaped by the same sunlight, revealing the geometry of the Sun–Earth–Moon system from deep space. Credit: NASA