Words starting with astronomicalr
Maybe these words will be useful:
- astronomical latitude — the angle between the direction of gravity at the observer's position and the plane of the celestial equator
- astronomical — If you describe an amount, especially the cost of something as astronomical, you are emphasizing that it is very large indeed.
- astronomical clock — a complex clock showing astronomical phenomena, such as the phases of the moon
- astronomical distance — the distance from one celestial body to another, measured in astronomical units, light-years, or parsecs.
- astronomical frame of reference — a frame of reference in which the sun or center of mass of the universe is fixed and which does not rotate with respect to the fixed stars.
- astronomical refraction — refraction (def 3).
- astronomical telescope — any telescope designed and mounted for use in astronomy. Such telescopes usually form inverted images
- astronomical triangle — the spherical triangle formed by the great circles connecting a celestial object, the zenith, and the celestial pole.
- astronomical twilight — the period of time during which the sun is 18° below the horizon
- astronomical unit — a unit of distance used in astronomy equal to the mean distance between the earth and the sun. 1 astronomical unit is equivalent to 1.495 × 1011 metres or about 9.3 × 107 miles