How long is a moon day?

The day of the month lasted 29.5 days on Earth day. In other words, if you are standing on the moon it will take 29.5 days for the sun to completely cross the sky and return to its original position.

The moon is completely locked on the earth. This means that it always points to the same side of the earth. We are always watching the same side of the moon. When standing above the moon, the earth always looks in the same position while the stars and the sun are moving through the sky. It takes 27.3 days for the moon to circle around the earth. And this is the same time it takes to make one revolution on that axis.

Wait a moment, what is this? 29.5 days or 27.3 days? This is a problem. When the moon moves around the earth, the earth goes round the sun. Earth returns to the same position on orbit every 365 days. Therefore, in order for the sun to capture the same position in the sky from the viewpoint of the moon, it must rotate a little more. The extra two days is the time the moon catches up with the rotation.

The number of days it takes for the Moon to circle the circle on the axis with respect to the star is 27.3 days, which is called Star Day.

The time it takes for the sun to return to the same position in the moon sky is called Observation Day, it takes 29.5 days.

The whole month cycle takes about 28 days. It takes 28 days for the Moon to travel around the Earth, and the same number of days is required to fully rotate the axis. This phenomenon is known as a tidal lock that keeps the moon always the same as the surface of the earth. Coincidentally, the other side of the moon does not face the earth. The moon tide rock is a surfer's dream. This is because the length and size of the moon causes gravity on the water surface, causing the sea to move, causing "tides", the water level goes up and down twice a day. Technically, the sun also affects the tide, but due to the short distance from the earth, the impact of the moon will increase.

Amateur astronomers have long believed using optical aids or using eyes to find the youngest satellites. The new moon crosses the sun during the day more or less between the earth and the sun. A few hours or several days after the exact moment of the new moon, the young moon is the moon. A young satellite is on the dome a little east of the sun (because the moon always moves east on orbit). A young satellite looks like a very thin crescent moon in our eyes and is probably illuminated by the earth and we are seeing a low western sky in a short period of time after sunset.

The moon arrives at the new moon on Wednesday morning. In the days around the new moon, the moon is always in the sky near the sun, which makes our night sky dark. On the east before dawn on Monday, April 24th, Venus and New Moon will rise together. The moon is 9 degrees lower than the bright planet. From Thursday you can find a light silver crescent in the low sky of the west sky after sunset. Venus glows in the east sky before dawn and moves south as it shakes towards the sun. It reaches the maximum brightness on the next Sunday of April 30 (display size -4.53). The pale yellow Saturn rises southeast after the local time of midnight and can be found until about 6 o'clock when there are two fist diameters above the south horizontal line.