Astronomy 101 consists of short video lessons that are organized into topical chapters. ... Astronomy a. nebula: [noun] any of numerous clouds of gas or dust in interstellar space. Equation: x2 + y2 = r2. The presence of methane causes its bluish hue. Circle definition, a closed plane curve consisting of all points at a given distance from a point within it called the center. The coldest theoretical temperature is called absolute zero.It is the temperature where the thermal motion of particles is at its minimum (not the same as motionless). Temperature is the property of matter which reflects the quantity of energy of motion of the component particles. The optical elements of eyepieces allow you to focus light collected by a telescope, so you can observe a sharp view of the object or area where the telescope is pointing. Uranus is the only planet that rotates on its side. Like Venus, it also rotates in the opposite direction. This law says that a planet traces out equal areas in equal time.Since the satellite does not trace out as much area when it is closer to the Sun, it has to move faster in order for this law to be true, so this law basically proves that objects move faster the closer they are to the central object. A faintly colored luminous ring or halo appearing to surround a celestial body when viewed through a haze or... Corona - definition of corona by The Free Dictionary. Kepler's Second Law. This planet has a long orbital duration, 84 years. When a star ‘goes supernova,’ considerable amounts of matter may be blasted into space with such a burst of energy as to … Astronomy only: telescopes, records scientific measurements during research, laws of physics, searches for new data about the physical Universe ... Place the items that are part of the definition of a planet in our Solar System into the bin. nae 1. It also has a ring system though it is very faint. Mathematics (from Greek: μάθημα, máthēma, 'knowledge, study, learning') includes the study of such topics as quantity (number theory), structure (), space (), and change (). Leave the items that are NOT part of the definition of a planet unplaced. Supernova, any of a class of violently exploding stars whose luminosity after eruption suddenly increases many millions of times its normal level. Frequency of a Wave. Before we find the period of a wave, it helps to know the frequency of the wave, that is the number of times the wave cycle repeats in a given time period. See more. The second law is slightly more complex. It may seem like a small link in the chain, but it has a large effect on your telescope's optical system, and finding suitable eyepieces will greatly enhance its potential. It is a comparative measure of how hot or cold a material is. It is the coldest planet of the Solar System with temperatures at around -224 degrees Celsius. 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