Across
- 5. refined the original geocentric model in his masterpiece ‘Almagest,’ which listed 48 constellations , and chartered the motions of the stars and planets.
- 6. becomes the first man-made object to orbit the Earth marking the beginning of the space age.
- 7. Dutch spectacles maker invents a refractor telescope
- 8. , During this period in Mesopotamia, the constellations of Leo, Taurus, Scorpius, Gemini, Capricorn, and Sagittarius were invented
- 9. The Egyptians start to use sundials.
Down
- 1. The worlds oldest solar observatory
- 2. put into orbit from space shuttle Discovery. The 2.4m aperture reflecting telescope continues to circle the Earth taking extremely sharp images of outer space.
- 3. Indian astronomer Yajnavalkya proposes a heliocentric concept of the universe
- 4. discovered that the planets orbit about the Sun in an elliptical and not circular motion
- 10. Greek philosopher Anaxagoras suggests that the stars are actually suns