TRUE OR FALSE only. 1. DIURNAL MOTION is caused by the daily motion of a planet on its axis. 2. Eudoxus was the first to propose that the sun is the center of the solar system. 3. The most perfect shape of the earth and universe according to Plato is cylindrical.

Match the astronomer to their contribution to ancient Greek astronomy: v Developed the long-standing geocentric model of the universe until it was replaced during the Renaissance A. Aristarchus v One of the first to claim that the Earth may orbit the Sun, but his ideas were rejected by later philosophers B. Aristotle v Developed a technique for measuring the circumference of the Earth long before anyone circumnavigated the globe with ships c. Eratosthenes D. Pythagoras v Used eclipses to confirm the shape of the Earth and that the Moon was closer to the Earth than the Sun despite the fact that they appear to be the same size in the sky E. Ptolemy v Brilliant geometric mind that was one of the first to propose that all of the heavenly bodies were spheres due to their perfect natures F. Hipparchus v Established the apparent magnitude system that we use to measure the brightness of stars and deduced that the direction of Earth's axis of rotation has changed over time

1. The diameter of the Sun is equal to 1.392*10^9 m, and the distance from the Sun to Saturnis equal to 9.5 AU. Suppose you want to build an exact scale model of the solar system,and you are using a volleyball with average diameter of 21 cm to represent the Sun. a) In your scale model, how far away would Saturn be from the Sun? Give your answer inmeters.b) The actual diameter of Saturn is 116,460 km. What would be Saturn’s diameter in yourscale model? Give your answer in centimeters.

7. Use Kepler's third law to evaluate the distance of Saturn from the Sun, using the following facts: (1) The period of Saturn is 29.5 years. (2) The Earth's distance to the Sun is 1 AU. (3) The period of the Earth is one year. (The Astronomical Unit (AU) is a measure of distance used in astron- omy.)

The total mass of a single stage rocket as it sits on the pad ready for launch is 3.20 × 106 kg. If fuel is consumed at the rate of 2.30 x 104 kg/s and the speed of the exhaust is 2.82 x 10° m/s, determine the following. (a) thrust produced by the engine (b) magnitude of the acceleration of the rocket just as it lifts off the launch pad 7m/s2

90.   Which of the following is NOT a reason for the very earliest ancient development of Astronomy include:         b. Testing early theories of physics.   c. Developing a calendar.   d. Religious and cultural ceremonies.

TRUE OR FALSE only no long explanation.  (pls answer it all at once) 4. Ancient astronomers believed that the Earth did not move because there was no stellar parallax observed.5. Galileo's observation of the planets supported the geocentric theory. 6. The planet closest to the sun has the shortest period of revolution about the sun. 7. In the proposed model by Copernicus, the earth was at the center of the universe.8. Epicycles refer to the circular paths taken by planets. 9. The second law of planetary motion implies that the product of velocity and the distance from the sun remain the same as a planet moves about the sun. 10. The first law implies that there is a common principle that governs the orbital motion of the planets.

Kepler's 1st law says that our Solar System's planets orbit in ellipses around the Sun where the closest distance to the Sun is called perihelion. Suppose I tell you that there is a planet with a perihelion distance of 2 AU and a semi-major axis of 1.5 AU. Does this make physical sense? Explain why or why not.

Taurus Aries Gemini South Pisces Cancer 44 East West If you could see stars during the day, the drawing above shows what the sky would look like at noon on a given day. The Sun is near the stars of the constellation Taurus.Which constellation will be highest in the sky at noon one month from now? O A. Pisces O B. Taurus C. Aries D. Cancer E. Gemini

H3. A total lunar eclipse is observed on December 31. Predict the next lunar eclipse. A total lunar eclipse will occur when the full moon and the nominal orbit of the moon line up together (The solution of two equations). From the following data algebraic equation for the phase of the moon and nominal orbit of the moon can be formed. A new moon (0%) was observed on December 17 and the full moon (10%) was observed on December 31 along with the nominal orbit of the moon (0%). The brimming orbit of the moon (100%) was observed on November 29. When the two equations are equal a lunar eclipse will occur. How many days from December 31 will next lunar eclipse occur? Given the coming year is a leap year - on what dates will the next 4 total lunar eclipses occur? Show the algebraic solution, any information you use.