Across
- 3. the fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse.
- 7. is the lighter outer part of a shadow.
- 12. the act of rising to an important position or a higher level.
- 13. the action or process of moving or being moved.
- 14. are small rocky objects that orbit the Sun.
- 15. an optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses, or of curved mirrors and lenses, by which rays of light are collected and focused and the resulting image magnified.
- 16. tide of maximal range, near the time of new and full moon when the Sun and Moon are in syzygy—i.e., aligned with the Earth.
- 17. are cosmic snowballs of frozen gases, rock and dust that orbit the Sun.
- 18. the process of removing unwanted hair from a part of the body by applying wax and peeling off the wax and hairs together.
- 20. having or representing the sun as the center, as in the accepted astronomical model of the solar system.
- 22. an optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses, or of curved mirrors and lenses, by which rays of light are collected and focused and the resulting image magnified
- 24. the star around which the earth orbits.
- 27. the natural satellite of the earth, visible (chiefly at night) by reflected light from the sun.
- 28. a large body of matter in orbit around the sun or a star and thought to be developing into a planet.
- 31. a small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction and appearing as a streak of light.
- 33. the universal force of attraction acting between all matter.
- 34. having or representing the earth as the center, as in former astronomical systems.
- 37. each of the four divisions of the year (spring, summer, autumn, and winter) marked by particular weather patterns and daylight hours, resulting from the earth's changing position with regard to the sun.
- 39. a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.
- 40. the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets. The planets of the solar system are (in order of distance from the sun) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
- 42. is a fragment of spatial matter that falls to the surface of a planet.
- 43. is the measurement east or west of the prime meridian.
- 45. the angular distance of a point north or south of the celestial equator.
Down
- 1. a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such.
- 2. a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure. Modern astronomers divide the sky into eighty-eight constellations with defined boundaries.
- 4. the action of rotating around an axis or center.
- 5. refers to a period of moderate tides when the sun and moon are at right angles to each other.
- 6. (of the moon) have a progressively smaller part of its visible surface illuminated, so that it appears to decrease in size.
- 8. he point in the orbit of a planet, asteroid, or comet at which it is furthest from the sun.
- 9. a kind of radiation including visible light, radio waves, gamma rays, and X-rays, in which electric and magnetic fields vary simultaneously.
- 10. the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
- 11. the alternate rising and falling of the sea, usually twice in each lunar day at a particular place, due to the attraction of the moon and sun.
- 19. relating to or belonging to a planet or planets.
- 21. is the movement of the Earth around the Sun.
- 23. is an imaginary line around the middle of a planet or other celestial body.
- 25. a celestial body moving in an elliptical orbit around a star.
- 26. a fixed luminous point in the night sky which is a large, remote incandescent body like the sun.
- 28. he point nearest to the sun in the path of an orbiting celestial body (such as a planet) — compare aphelion.
- 29. is the measurement of distance north or south of the Equator.
- 30. occurs when a portion of the Earth is engulfed in a shadow cast by the Moon which fully or partially blocks sunlight.
- 32. an obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination.
- 35. s a closed-plane curve that results from the intersection of a plane cutting through a cone.
- 36. the force that attracts a body toward the center of the earth, or toward any other physical body having mass.
- 38. is a spacecraft that travels through space to collect science information.
- 41. any of the small bodies, often remnants of comets, traveling through space.
- 44. is an event in which a planet's subsolar point passes through its Equator.