Sun on Other Planets

Discover what it is like to look at the Sun from the surface of another world.

The position of the Sun on our planet is ideal for us. We have a planet where temperate climates prevail in a habitable region because the sun is too far away to make the air too hot or too cold. We also have a bright blue sky because the molecules in our atmosphere radiate blue light rather than other colors!

The situation on the planets Venus and Mercury is different. In the first, the atmosphere is too thick, so it is hard to see the sun (Jupiter, Saturn, Uranus and Neptune are the same), but we know that the sky was orange-red because of the spacecraft sent by the Soviet Union in the 70s and 80s. In Mercury with no atmosphere, the sun is bright, scorching, warm and white.

We’re not the only planet with a blue sky. Jupiter, Saturn, Uranus, Neptune, and maybe even Pluto (we define it as a “classic gezegen planet, even though it is a dwarf planet) probably has a blue sky. We’re not quite sure, because we never looked under their atmosphere. On Mars, the sky is usually red, only blue at sunrise and sunset.

AU: Astronomical Unit (Earth’s Distance to the Sun)


In Mercury, closest to the Sun, 0.39 AU away, the Sun looks 2.5 times larger than the Earth. One Mercury day equals 176 Earth days, so the Sun stands in the sky for a long time.


Venus, 0.72 AU away, is the hottest planet in the Solar System due to its thick atmosphere. There is no Sun on the surface, but it looks larger than a third of what it appears on Earth above the clouds.


The Earth is located at a distance (1 AU) that allows the existence of liquid water from the Sun, that is, in the habitable abundance region of the Solar System. So we have a blue sky dominated by the sun during the day.


The Sun, which is 1.5 AU away from Mars, appears as much as two thirds of what it appears to Earth. It takes 40 percent of the Earth’s light, which makes the Red Planet dimmer than ours.


In Jupiter, 5.2 AU away, the Sun is a quarter of the Earth’s size. Jupiter has the thickest atmosphere of the Solar System, and if you could stand under it, you wouldn’t see anything.


Saturn is 9.5 AU from the Sun. Here, the Sun appears to be one-tenth the size it appears on Earth. The rings of Saturn can be seen from anywhere except Ecuador.


Uranus outside the Solar System is 19.2 AU away. Here the Sun appears to be about one-twentieth the size of Earth. It’s hard to see Uranus’s 27 satellites because they’re all so dim.


In Neptune, 30.1 AU away, the Sun appears to be about thirty-one the size of Earth. This makes it difficult for his satellites to appear (except Triton), but the sun is the brightest object in the sky.


Pluto has an eccentric orbit. The farthest point of the orbit is 49.3 AU. Although the sun looks 50 times dimer than Earth, it is surprisingly 150-400 times brighter than the full moon, depending on where it is in its orbit.

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