Junior one science problem

2. Model meridian equatorial latitude

3. British prime meridian 20160 east-west

4. Direction scale legend notes North-South-West-East pointer scale

5. Map zoom small details

6. Radiation zone and convection zone in the core area

7. There is no air when the earth's craters collide with celestial bodies.

8. Shu Tian and the celestial extension of the Big Dipper in the 88 constellation.

9.23.53059 Dates of the first month, the full moon and the last quarter.

10. The first day of the solar eclipse is the west and the east.

1 1. The eclipse looks east and west.

12.7 in a straight line

13. Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Mars Jupiter

14. Halley's comet (living comet? ) Jupiter and Saturn have very flat rings at their poles.