aphelion
Orbit's distant extreme
Aphelion is the point in a planet's or comet's orbit when it is farthest from the sun—the opposite of perihelion.
Earth reaches aphelion in early July, when it's about 152 million kilometers from the sun.
The term applies to any object orbiting the sun: The comet's aphelion takes it beyond Neptune's orbit.
orbital
Celestial body position chart
- perturbationState of being unsettled
- eccentricityUnconventional behavior or nature
- KeplerPlanetary motion law formulator
- ellipseConic section curve
orbital velocity · inclination · longitude · anomaly · epoch · barycenter · gravitational · conjunction
solar
Day of maximum tilt
- equinoxSun crosses celestial midline
- seasonalRecurring at fixed intervals
- insolationSolar radiation received
ephemeris
Celestial body position chart
- perturbationState of being unsettled
- eccentricityUnconventional behavior or nature
- KeplerPlanetary motion law formulator
ellipse · orbital velocity · inclination · longitude · anomaly · epoch · barycenter · gravitational · conjunction · opposition
July
Seventh calendar month
solstice
Day of maximum tilt
- equinoxSun crosses celestial midline
- seasonalRecurring at fixed intervals
- insolationSolar radiation received
farthest
Most distant point
- astronomystars, moon, sun, planet, planets
- solar systemsun, Earth, Mars, Jupiter, Saturn
- spacespace, sun, moon, stars, star
- celestial cycleslunar cycle, solar cycle, lunar phase, orbit, eclipse
- orbit termsellipse, trajectory, satellite, revolution, rotation
- orbital termsEarth orbit, lunar orbit, satellite orbit, perigee, eccentricity