Bright Side

The Solar System Is Not Like You Think It Is

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The Earth is round, Mercury is the hottest planet, and the Sun is yellow. It would seem that these are all simple, undeniable facts known even to those with no real knowledge of astronomy. However, it’s time to think again.


TIMESTAMPS

Does the Moon have a dark side? 0:23

Is the temperature of Mercury higher than on other planets? 1:01

Is the Sun just a big ball of fire? 2:01

Is the Sun really yellow? 2:50

Would a human being explode in space without a space suit? 3:41

Is the Earth further from the Sun in winter than in summer? 4:48

Is the Earth perfectly spherical? 6:03


SUMMARY

  • The Sun shines and warms both the visible and invisible parts of the Moon. The truth is that the period the Moon takes to revolve on its axis coincides with the amount of time it takes to orbit the Earth. That’s why we only see one side of it.
  • Mercury is closest to the Sun; therefore, its surface temperature must be higher than all the other planets. However, the hottest planet in the Solar System is actually Venus, despite the fact it’s 31,070,000 miles (50 million km) further away from the Sun than its neighbor.
  • What we think of as fire is, in fact, energy in the form of heat and light, produced by the thermonuclear reactions occurring in the star’s core.

    • A thermonuclear reaction involves changing some elements into others, and it’s accompanied by the ejection of heat and light energy.

    • Why do human eyes see the Sun as yellow? It’s all down to Earth’s atmosphere. As is well known, light which has a long wavelength, in the yellow and red part of the spectrum, passes through the atmosphere best of all. Light in shorter wavelengths, in the green to violet part of the spectrum, gets dissipated to a greater degree by the atmosphere.
    • Our skin is flexible enough to keep all of our internal organs in place. The walls of the blood vessels would also prevent the blood from boiling thanks to their elasticity. Moreover, in the absence of external pressure in the space environment, the temperature at which blood boils rises to 115°F, which is significantly higher than the temperature of the human body.
    • The axis of the planet, which passes through the North and South Poles, is not exactly perpendicular to its orbit and the Sun’s rays which fall on it. In turn, for half of the year, a large proportion of the Sun’s warmth falls on the southern hemisphere, while in the other half it falls on the northern one, which produces a change of seasons.
    • The shape of our planet is constantly changing due to the constant movement of the continental plates. Of course, the rate at which they move is tiny — on average about 2 inches (5 cm) a year. However, this still has an effect on the planet’s "appearance," which is, in fact, far from perfectly round.


      • Did you enjoy watching the video? Did you learn anything new today? If so, don’t forget to hit the like button below the video.


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