Kepler's first law explains that the sun is the focus of our solar system, and that the orbit of a planet around the sun is an ellipse the speeds of the sun, moon, and stars are perfectly uniform and unchanging the orbits of the sun, moon, and stars are perfect circles the moon is not in orbit around the sun

The correct answer is A) the orbit of a planet around the sun is an ellipse the speeds of the sun.

Kepler's first law explains that the sun is the focus of our solar system and that the orbit of a planet around the sun is an ellipse the speeds of the sun.

The three laws of Kepler are the following. The Law of Orbits: all planets move in an elliptical orbit, with the sun at one focus.

The Law of Areas: a line that connects a planet to the sun sweeps out equal areas in equal times.

The Law of Periods: the square of the period of a planet is proportional to the cube of the semimajor axis of its orbits.