How to calculate the size of Jupiter in the sky from Europa (or anywhere)

From the surface of Europa, Jupiter appears immense in the sky, at about 24 times wider than the Moon appears from Earth.

Here's a breakdown of the key details we'll need:

• Jupiter's diameter: ~142,984 km

• Average distance from Europa to Jupiter: ~670,900 km

And now for the formula:

• Angular diameter formula:

  

Compare that to:

• Full Moon as seen from Earth: ~0.5°

• Jupiter from Europa: ~12.2°

Therefore, Jupiter spans about 24 times the width of the full Moon, or nearly 600 times the area in the sky. (PS thats 12*0.5 = 24)

If you want to see what that looks like in our game, click HERE