Which satellite overtakes its planet in its rotation around its own axis? Detailed answer

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Which satellite overtakes its planet in its rotation around its own axis? Detailed answer

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Which satellite overtakes its planet in its rotation around its own axis?

This unique property has only one of the satellites of the planets of the solar system - Phobos, a satellite of Mars.

Phobos makes a full revolution around Mars in 7 hours 39 minutes and 14 seconds, and the planet turns around its own axis in 24 hours 37 minutes and 23 seconds. It rises and sets in the Martian sky twice a day, while it rises in the west and sets in the east.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

How does a snake inject its venom?

In poisonous snakes, one of the salivary glands produces a substance that is dangerous to the victim. This substance is snake venom. The venom of some snakes is so dangerous that it can kill an elephant. In others, this substance is not so toxic. They can only kill a small lizard. Only two hundred venomous snakes out of 412 known species are considered dangerous to humans. Two of them are African snakes: rattlesnake and flying. They have fangs in their mouths.

Fangs are two or three teeth, greatly enlarged and having a groove on one side. Just above the fangs there is an opening leading to a poison-producing gland. When a venomous snake bites, the venom enters the trough and flows through it into the wound made by the fang. The cobra has fangs at the front of its mouth, one on each side. In most cobras, the canine groove is covered, forming a tube. The venom gland is surrounded by muscles. When the snake bites, the muscles press on the gland. This entails the flow of poison into the gutter, and then through the fang into the victim.

A cobra can inject venom from a fang, just like a liquid from a syringe. It's a spitting cobra. She aims directly at the victim's eyes. Its jet reaches almost 2,5 meters and almost always causes blindness. Poisonous snakes have a very perfect venom delivery system. Their fangs are very long, but can fit into the mouth so that the mouth can close. When the mouth opens to bite, the jaw moves forward, carrying the fangs at the correct angle to the throat.

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Random news from the Archive

brain temperature 08.06.2022

Scientists from the Laboratory of Molecular Biology of the Medical Research Council in Cambridge were able to measure the temperature of the human brain.

Forty volunteers aged 20-40 years were recruited, whose brains were scanned in the morning, afternoon and late evening using magnetic resonance spectroscopy. At the same time, an activity monitoring device was attached to the wrist of the participants in the experiment, which makes it possible to take into account differences in genetics and lifestyle - the biological clocks of "owls" and "larks" work differently.

The temperature of the organ varies depending on the region of the brain, age, gender, time of day and the menstrual cycle in women.

The average brain temperature was 38,5 degrees, more than two degrees above the temperature measured under the tongue.

The surface of the brain was generally colder, while the deeper structures of the brain were often warmer than 40 degrees (the record during the study was 40,9 degrees).

The temperature of the brain constantly changed depending on the time of day by almost one degree, while the highest was observed during the day, and the lowest was at night.

It is noteworthy that, on average, the female brain was 0,4 degrees warmer than the male.

Experts believe that this gender difference is most likely due to the menstrual cycle, since most of the participants in the study were scanned in the post-ovulatory phase of their cycle: their brain temperature was about 0,4 degrees higher than that of women who were in the pre-ovulation phase.

The temperature of the brain increased with the age of the participants, especially in the deep regions of the brain.

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