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2. Earth with 2 Sunrises and 2 Sunsets (The Night Sun)

Now we will see how the situation on Earth was when the second sun was functioning normally.

Oxygen isotope data from ancient sedimentary rocks suggest that the early Earth was much hotter than today, QUOTE: "according to oxygen isotope records, early Earth surface temperatures could have been as high as 45 85 degrees C!"

On the other hand, it is said that the early Sun was cool, giving only about 70% of solar heat, or even less. So where did the extra heat on the earth come from? Many theories have been suggested, but without any supporting evidence at all.

In the present time, as everybody knows, a day on the Earth is 24 hours, but the early Earth's day is said to be much shorter. It was about five to six hours only. One theory suggests that a large object, in the size of Mars, impacted the Earth and set it to spin very fast. But there is no sign of such a large object to ever hit the earth! QUOTE: "Scientists estimate that a day in the life of early Earth was only about 6 hours long."

Now we have alternative explanations, the early earth was not rotating so rapidly, it is just the other sun made the day seems very short; one sun sets and the other sun rises. Regarding the early Earth's surface temperature, the extra heat was coming from the second sun.

But the Second Sun was much hotter on Mars, so it burned its atmosphere!

 What happened to the atmosphere of Mars?
Mars' atmosphere is just about 1% the atmosphere of Earth. Some attribute this to the low gravity of Mars. Gravity may play a role in keeping the atmosphere of a planet, but it is not directly proportional to the atmosphere thickness. Venus has less gravity than Earth, but it has an atmosphere that is 90% denser.

NASA studied the atmosphere of Mars and concluded that it was stripped from the top: "The enrichment of heavier isotopes measured in the dominant carbon-dioxide gas points to a process of loss from the top of the atmosphere"

But how this can happen: "a process that is thought to be driven by interactions with the solar wind."

The so called -- solar wind -- isn't air, but a solar radiation of charged particles.

Title: "Mars Atmosphere ERODED by Sun Activity"

Some have suggested that the solar wind of the existing sun was very strong: "the solar wind is thought to be very strong at the beginning of our solar system history."

The assumption above that the solar wind of the existing sun was stronger at the time of formation is based on the burned atmosphere of Mars, and nothing else. If this is true, the effect on Venus and Earth would have been much more!

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