How to Play
• Answer the Science General Knowledge questions on Space, then find the words in the grid.
• Words appear horizontally, vertically, diagonally and backwards. Some words may overlap.
Quiz Questions
1. In a binary star system, the maximum point of separation between the two, in their elliptical orbit, is called this.
2. This twilight is the instant in the morning, or evening, when the light from the Sun, is less than that from starlight, and other natural light sources in the sky.
3. Weaker stellar winds blow bubble structures, which are called these, such as the heliosphere blown by the solar wind, which the planets are embedded in.
4. This imaginary line, about which the Earth rotates, passes through the north and south poles.
5. This is a depression found in an astronomical body, resulting from high-velocity impacts from a smaller body, such as a meteorite.
6. Magnetic fields in major planets, stars, and spiral galaxies, provided they rotate sufficiently rapidly, and possess a substantial outer convection zone, are maintained by hydromagnetic what?
7. A gravitationally bound entity, consisting of dark matter, gas, dust, stars, and mainly in clusters.
8. A vast lava plain, within this Basin on the Moon, formed when a proto-planet collided with the lunar surface.
9. This is used in optical interferomentry, to detect the presence of gravity waves, that could have been produced by exploding stars, or colliding galaxies.
10. The direct measurements of radiated light emitted over time. These galaxy measurements are much harder to measure than stellar ones, because they have no well-defined edges.
11. These swirls, are flat markings of moon dust across the Moon’s surface. They have a high albedo.
12. This is when the pull of gravity is not strong, and appear weightless eg when astronauts float in space.
13. It orbits a planet or solar system body, and is Earth’s only natural satellite, at about one-quarter the diameter of Earth.
14. The point of closest approach between the two stars in a binary star system is this.
15. This nebula is a phase consisting of an expanding, glowing shell of ionized gas, ejected from red giant stars, late in their lives.
16. The state of matter after solid, liquid and gas, where there are roughly equal numbers of positively and negatively charged particles. A star is a luminous spheroid of this, held together by its gravity.
17. This was changed in 2006 from the ninth planet to a dwarf planet. It is the largest known object in the Kuiper Belt.
18. It refers to the movement of all the planets around the Sun.
19. A boom that is the sound associated with shock waves, created when a object travels through the air faster than the speed of sound.
20. The Outer Space Treaty, states that outer space is free for all nation states to explore, and is not subject to claims of national what.
21. Astronomical objects comprising a luminous spheroid of plasma, held together by their gravity.
22. The point on a planet at which the Sun’s rays strike the planet exactly perpendicular to it’s surface.
23.This is a layer of Earth’s atmosphere, located above the mesosphere, and below the exosphere.
24. The Moon’s gravitational pull causes Earth’s what bulges, on both the sides closest to the Moon, and the side farthest from the Moon. These bulges create high tides. The low points are where low tides occur.
25. For a planet, the habitable or Goldilocks what is the distance from a star that allows liquid water to exist on its surface, and so long as that planet has a suitable atmosphere, where conditions might be just right for life, neither too hot or too cold.
• Find the answers to the quiz in the grid below.