American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Existing or occurring between planets.
Century Dictionary and Cyclopedia
- Situated between the planets; within the solar system, but not within the atmosphere of the sun or any planet.
GNU Webster's 1913
- adj. Between planets.
- adj. between or among planets
- inter- + planetary (Wiktionary)
“The EPOXI spacecraft is indeed in interplanetary space; during the DINET test its distance from Earth varied between 81 and 49 light seconds, which is around 50 times the distance to the Moon, around 1/4 of the distance to Mars at closest approach, and around 1/20 of the maximum distance to Mars.”
“It would enable a drastic reduction in interplanetary transit times necessary to maintain functional humans.”
“He's also a proponent of manned space travel even though his background might indicate that he would be more interested in interplanetary robotic missions.”
“A meteoroid is matter revolving around the sun or any object in interplanetary space that is too small to be called an asteroid or a comet.”
“--- Returning to the Moon achieves "step-by-step approach of new achievements in interplanetary flight" far better than not doing so, as I have indicated in my list above.”
“TPS Statement * achieving a step-by-step approach of new achievements in interplanetary flight, including a human mission to a near-Earth object”
“One craft she identified as interplanetary, a new and shapely version of Moonjumper.”
“They're part of an experiment to find out how a crew would handle the stress, claustrophobia and fatigue real astronauts would face in long-term interplanetary travel.”
“Even though we think of meteorites as being blazing hot, they’re actually very, very cold, having been chilled in interplanetary space for eons.”
“That’s the first point I want to get across: that if the distances involved in interplanetary travel are enormous, and the travel times fit to rival the first Australian settlers, then the distances and times involved in interstellar travel are mind-numbing.”
Looking for tweets for interplanetary.