#004_2020-10-28

Of the millions who saw Haley’s comet in 1986, how many people will live long enough to see it return in the twenty-first century.

Jupiter

Mercury

Neptune

Saturn

Uranus

dwarf planet

meteor, meteoroid

Pluto

quasar

satellite

elliptic orbit

astronomy

aureole

celestial

cosmos

galaxy

stellar

lunar

meteorite

nebula

wormhole