Celestial bodies

火星
Mars

The red planet, about −2.9 magnitude at opposition.

Oppositions come every 26 months, 55–100 million km away.

Related terms

Jupiter — The largest planet, around −2.5 magnitude.
Saturn — The ringed planet; separating rings from disc needs about 30×.
Mercury — The innermost planet, never more than 28° from the Sun.
The Moon — Earth's only natural satellite, 3474 km across.