Editing 2262: Parker Solar Probe

This is an informative comic meant to represent the relative distances of astronomical objects relative to the {{w|Parker Solar Probe}}. It also shows where the probe will be in 2025 if its mission continues going according to plan. As explained by the caption at the top of the image, the distances between entities on the chart is drawn to scale; the ''sizes'' of said entities, however, are not, which is humorously showcased front-and-center by Cueball and Megan being shown as Earth-sized.

The Parker Solar Probe is a robotic spacecraft launched by NASA in 2018 with the mission of repeatedly probing and making observations of the outer corona of the Sun. It travels in an elongated orbit that passes close to the Sun and sometimes passes near Venus, arranged such that Venus nudges the orbit slightly in each pass to bring the probe's perihelion (the lower end of its orbit) closer and closer to the Sun. Two days before this comic was published {{w|Parker_Solar_Probe#Timeline|the probe again passed through perihelion}}, establishing new records for closeness to the Sun (0.12 {{w|Astronomical unit|AU}}) and speed (244,225 mph).[https://blogs.nasa.gov/parkersolarprobe/2020/01/29/parker-solar-probe-completes-fourth-closest-approach-breaks-new-speed-and-distance-records/] By the end of the probe's planned lifetime in 2025, it will pass within 0.046 AU (6.9 million km), or about 5 solar diameters, of the Sun's center, at a speed of 430,000 mph (690,000 km/h). The title text incorrectly states this distance to be ''9 or 10'' solar diameters measured from the Sun's ''surface''.

[[Cueball]] and [[Megan]] are standing on Earth. The way this diagram is drawn, they look like they could fall off Earth toward the Sun -- hence the comment "Careful!" -- though the joke is that in real life they would fall toward the center of the Earth, not toward the Sun. Also the surprise for many people is that it is much harder to reach the Sun than Pluto, because we travel so fast here on Earth. To reach the Sun this speed has to be reduced, which is a larger speed difference than the one needed to escape the Sun's gravity well. If you could "fall" off Earth, you would just keep the approximately same distance to the Sun, but drifting slowly away from Earth.

The title text says the probe will get within 9 or 10 Sun-''diameters'' of the Sun's ''surface''. This is a bit of a mistake: it will actually get {{w|Parker Solar Probe|within that many Sun-''radii''}} (only 4½ or 5 Sun-diameters) of the ''center'' of the Sun, which corresponds to 4 or 4½ Sun-diameters above its surface. All the same, the title text makes the point that "Sun-diameters" (or "Sun-radii", for that matter) sounds like an astronomical distance, until you use the same scale for other distances. The distance from the Earth to the Sun is approximately 106 Sun-diameters; by that scale, 4 Sun-diameters is indeed "practically all the way down". Below is a table showing these and other distances using more common units of measurement.

{|class=wikitable

! Object

! Perihelion [km]