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The answer is A- Venus has phases.
The Copernicus's heliocentric (Sun-centered) theory stated that the Sun is at rest near the center of the Universe, and that the Earth, spinning on its axis once daily, revolves annually around the Sun. He proved this theory by discovering that Venus went through phases just like the moon by recording his observations through the telescope.He also disproved the theory that the sun and other planets revolve around the earth through his recorded observations seen via the telescope.
The discovery Galileo made to support the theory that the planets, including Earth, orbit the Sun is that Venus has phases.
What are Phases?
This is defined as a planet's area that reflects sunlight when viewed from a given point with the duration being inclusive.
Galileo discovered that Venus has phases which depicts that planets, including Earth, orbit the Sun.
Read more about Solar system here https://brainly.com/question/1286910
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