Aphelion (noun)

In astronomy, the point in the orbit of a planet or comet at which it is farthest from the sun.

Origin:

From greek apo- "away from" + helios "sun".

Examples:

1. Earth is farther from the sun at aphelion than at perihelion.
2. Mercury's aphelion is nearly 43 million miles from the sun.
3. The asteroid"s aphelion is farther away from the sun than Neptune"s orbit.
4. Aphelion is the opposite of perihelion, which is the point in the orbit where a planet or comet is closest to the sun.
5. Aphelion occurs in early July, when Earth is about 94.5 million miles from the sun.