High-Speed Mapping: Flyby Missions in Space Quiz

If a spacecraft is launched with a trajectory that takes it near a planet but does not involve slowing down to enter orbit, then the mission is defined as a flyby.

If a spacecraft is moving at high velocity to reach the outer planets, and if it does not have enough fuel to reverse its direction, then it will continue traveling into deep space rather than returning to Earth.

If a mission was designed for a "Grand Tour" of the outer solar system, and if Voyager 2 successfully passed all four giant planets in a single trip, then it is the primary example of a multi-target flyby.

If a flyby spacecraft passes a planet at high speed, then it only has a small window of time to take photos; if the planet is rotating slowly, the spacecraft will only capture the half of the planet facing the cameras during that brief encounter.

If a spacecraft does not need to carry the heavy fuel required to "brake" and enter orbit, then it is lighter and cheaper; if it maintains its speed, it can use the gravity of one planet to sling it toward the next target.

If a spacecraft enters the gravitational field of a massive planet and "steals" a bit of the planet's orbital momentum, then the spacecraft gains velocity; this maneuver is scientifically known as a gravity assist.

If New Horizons was launched to study the edge of our solar system, and if it passed Pluto at a distance of 7,800 miles to take the first high-resolution photos, then Pluto was the target of that flyby.

If the Sun provides light to the entire solar system, and if high-sensitivity cameras can capture that light even at great distances, then the spacecraft relies on natural sunlight rather than carrying heavy artificial lights.

If a planet is very far away and its environment is unknown, then sending a fast, unmanned flyby is the safest and most efficient way to get initial data before planning more complex landing or orbiting missions.

If a spacecraft passes near a planet, its cameras and sensors can record light, heat, and magnetism from a distance; however, a flyby cannot collect physical soil samples because it does not land or stop.

If a spacecraft follows a curved path past a planet, there will be one specific moment where the distance between the two is at its minimum; this point is defined as the closest approach.

If scientists were once worried that the asteroid belt would destroy any spacecraft, and if Pioneer 10 safely navigated through it in 1972 to reach Jupiter, then it was a pioneer in flyby exploration.

If a spacecraft is looking at a spherical planet from one side, it can only see half of the surface at once; therefore, the image captured represents one hemisphere.

If a spacecraft is billions of miles away, the signal must be very reliable; if radio technology is well-established for long-distance communication through the interference of space, then it is the preferred method for data transmission.

If an orbiter stays in one place for a long time, it can watch changes in weather and wait for the planet to rotate fully; if it remains nearby, it can act as a communication hub for a lander on the surface.

If a spacecraft needs to reach the outer solar system in a reasonable amount of time (like 9 years), then it must travel at extreme speeds; New Horizons moved at roughly 14 kilometers per second (over 30,000 mph).

If the outer planets move in their orbits at different speeds, then they only line up in a specific curve occasionally; if math shows this alignment occurs roughly every two centuries, then the 175-year figure is accurate.

If NASA launched a mission in 2021 to visit the Trojan asteroids near Jupiter using multiple flybys, then that mission is named Lucy.

If a planet is covered in clouds, the camera can't see the ground; if the craft is too fast, the image blurs; if radiation is high, it can damage the electronics; and if light is dim, the photos may be dark.

If the spacecraft cannot return to Earth, then the only way to get the information is to convert the images and readings into digital code and beam them back using a high-gain antenna.