The second molars on the top come in soon after those on the bottom. 3 years. Your child has a full set of 20 baby teeth. 4 years. Jaw and facial bones grow, creating space between the baby teeth for your child's permanent teeth to come in.
As the moon moves eastward around 13 to 15 degrees per day in the sky in its orbit about the earth (there are 360 degrees around the whole sky for it to complete its orbit in 27.3 days), it moves with respect to the background stars noticeably each day, causing it to rise nearly an hour later each day/night when compared to the previous day/night.
Sometimes the planets appear to change direction in the sky. This retrograde motion is entirely an illusion caused by the Earth passing the slower moving outer planets. Sometimes, the planets seem to move backwards!Typically, the planets shift slightly eastward from night to night, drifting slowly against the backdrop of stars. From time to time, however, they change direction.ometimes the planets appear to change direction in the sky. This retrograde motion is entirely an illusion caused by the Earth passing the slower moving outer planets. Sometimes, the planets seem to move backwards!