About Earth
Earth is a mythic planet. It completes an orbit every 365.26 days and swings within 0.983 AU of the Sun at perihelion.
The one world we know for certain carries life — and the only free oxygen atmosphere we have ever detected anywhere.
Mythic planet 151 EP
Earth
Position computed live · planets
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Live ephemeris
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Score breakdown
· 6 badgesMythic Top tier reached ✦
- Hosts life +44
- Home world +42
- Major planet +40
- Thick atmosphere +12
- Has a proper name +8
- Has moons +5
Total score 151
Badges
- Major planet · +40
- Has a proper name · +8
- Home world · +42
- Hosts life · +44
- Has moons · +5
- Thick atmosphere · +12
Trivia
What makes it special
- Life. The one world we know for certain carries life — and the only free oxygen atmosphere we have ever detected anywhere.
Hard to believe
- Home. The only place in the known universe where anybody has ever been born. Everyone you have ever heard of lived and died here.
What it actually is
- One moon. It has exactly one natural satellite, which is unusual: most moons come in crowds.
Sense of scale
- Against Earth. Almost exactly the size of Earth.
- Ground to cover. Its whole surface adds up to about 510.1 million km² — roughly 3.4 times Earth's dry land.
- Walk around it. Walking right round its equator, eight hours a day, would take about 2.7 years.
Standing on it
- Heavy air. A thick atmosphere presses down on the surface — the sky here is anything but empty.
By the numbers
- Size. About 12.7 thousand km across.
Properties
- aphelion au
- 1.0167
- color
- #4a86c4
- diameter km
- 12742
- eccentricity
- 0.0167
- home world
- yes
- hosts life
- yes
- inclination
- 0
- name
- Earth
- named
- yes
- num moons
- 1
- orbital period days
- 365.256
- perihelion au
- 0.9833
- radius km
- 6371
- semi major au
- 1
- thick atmosphere
- yes
How to see it
Like any astronomical target, Earth is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. Because it moves against the background stars, the live position panel on this page tracks where it is right now. The visibility panel above works out tonight's viewing window for your saved location.
Why Earth is a mythic planet
Earth scores 151 points on Spacedle's rarity scale, which places it in the mythic tier.
That score comes from 6 science badges — Major planet, Has a proper name, Home world, Hosts life, Has moons and Thick atmosphere — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.