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Impossible to say. The planets of our solar system were created at about the same time. About 4.5 to 5 billion years ago.

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10y ago

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How does mercury's age change?

Each day it gets one day older, that would mean that over the course of a year the planet would become a year older.


Which planet has its year only 88 earth days long?

Mercury is the planet with an 88-day year.


Can mars be adwarf planet ever?

No one knows for sure yet. Some day Mercury can become a drawf planet because of how small it is. If Mercury does become a drawf planet Mars is probably next.


Which planet's day is closest in length to its year?

The planet Mercury has a day that is almost the same length as its year. Mercury's rotation period is about 59 Earth days, which is very close to its orbital period around the Sun of about 88 Earth days. This means that one day on Mercury is almost as long as one year on Mercury.


Which planet has a day more than half as long as its year?

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What is a planet with long days and a short year?

Mercury has the shortest year of any of the planets. It is only 88 days. Mercury's day takes 58.646 Earth days.


What planet has a day half as long as its year?

That's Mercury: "sidereal day" is more than half its year. Or, it could be Venus: "solar day" is just over half its year.


What planet day is more than half as long as it's year?

It's Mercury or Venus, depending on which definition of "day" you use.


Why is mercury hot at day but cold at night?

Mercury is the hottest planet, because it is the closest planet to the sun.


What planet has a year shorter than its day?

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Which planet has a day more than half as long as a year?

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Why is Mercury's year 88 days if Mercury is the fastest planet and closest to the sun?

Mercury's year of 88 days is pretty short when compared to Earths 365 day year. The orbital period gets longer the further you go out. Neptune is the furthest planet out and takes nearly 165 years to go around the sun once.