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Space

Across
The action of rotating about an axis or center
The dark central part of a sunspot.
a band of colors, as seen in a rainbow, produced by separation of the components of light by their different degrees of refraction according to wavelength.
The speed of something in a given direction.
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.
a celestial body orbiting the earth or another planet.
A tide just after the first or third quarters of the moon when there is least difference between high and low water.
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
a space entirely devoid of matter.
a kind of radiation including visible light, radio waves, gamma rays, and X-rays, in which electric and magnetic fields vary simultaneously.
very weak gravity, as in an orbiting spacecraft.
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.
the scanning of the earth by satellite or high-flying aircraft in order to obtain information about it.
The first appearance of the new moon.
a telescope that gathers and focuses light, mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct view, or to make a photograph, or to collect data through electronic image sensors.
Down
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.
The propulsive force of a jet or rocket engine.
The regularly repeated elliptical course of a celestial object or spacecraft about a star or planet.
the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
a rocket that uses two or more stages, each of which contains its own engines and propellant.
How fast a planet travels as it orbits around the Sun
A circular orbit positioned approximately 35,900 km (22,258 mi) above Earth's equator and having a period of the same duration and direction as the rotation of the Earth.
measured from or considered in relation to the center of the sun.
a celestial body moving in an elliptical orbit around a star
a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such.
The movement of an object in a circular or elliptical course around another or about an axis or center.
A cylindrical projectile that can be propelled to a great height or distance by the combustion of its contents, used typically as a firework or signal.
a thin band or disk of rock and ice particles around a planet. a circular marking or pattern.
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
An imaginary line about which a body rotates. ‘the Earth revolves on its axis once every 24 hours’