[Article déjà publié le 6 janvier 2025]
On Earth, from January 1 to December 31, it flows 365 days or 366 days during a bisextile year, it is time that a year lasts. But is it the same thing everywhere in the solar system?
The answer is not obviously and you will see that it takes more than one human life for a certain planet to make a complete turn of the sun.
A year in the solar system
Based on the data disseminated by the National Center for Spatial Studies (CNES), the French space agency, it is how long you would spend on a planet of the solar system if you could go there for a year:
- Mercury: 88 days
- Venus: 224 days
- March: 687 days
- Jupiter: just under 12 years old
- Saturn: 29.4 years
- Uranus: 84 years old
- Neptune: 164.8 years
Thus, there is very little chance that you are witness in your life, to see a complete tour of Uranus around the sun and no chance of seeing Neptune complement an entire “year”. Only certain animal species such as the Groënland shark, which can live more than 400 years, for example may have witnessed, without being aware of it, at least two rotations of Neptune during his life.
Long year = long day?
The question that can be asked right after is that which concerns the duration of the days on the different planets of the solar system. The more we move from the sun, the longer the days? Or not at all?
On Earth, a day, a phenomenon that defines a complete rotation of a planet on itself, lasts about 24 hours (23h 56 min 4 s for the CNES). Here is the duration of a day on each planet of the solar system:
- Mercury: 58.6 days
- Venus: 243 days
- March: 24.7 hours
- Jupiter: just under 10 hours
- Saturn: 10:33 a.m.
- Uranus: 5:14 p.m.
- Neptune: 4:06 p.m.
Thus, we note that the telluric or rocky planets have much longer days than their carbonated cousins. But the most surprising is really in terms of Venus. Indeed, considered as a “twin” of the earth in terms of size, only one day there lasts from January 1 to September 1.
Which does, you will have noticed that one day on Venus is longer than a year on Venus.
Source: CNES
With an unwavering passion for local news, Christopher leads our editorial team with integrity and dedication. With over 20 years’ experience, he is the backbone of Wouldsayso, ensuring that we stay true to our mission to inform.
