Posted on April 22, 2022 (Updated on July 9, 2025)
What is the difference between a star and a meteor?
Space & NavigationMeteors. If a meteoroid comes close enough to Earth and enters Earth’s atmosphere, it vaporizes and turns into a meteor: a streak of light in the sky. Because of their appearance, these streaks of light are sometimes called “shooting stars.” But meteors are not actually stars. Is a meteor considered a star? Video quote: It's
Posted on April 22, 2022 (Updated on July 9, 2025)
What is Apothem length of a hexagonal prism?
Space & NavigationSo, the apothem of a regular hexagon with 8-cm sides is about 6.93 cm. Where is the apothem in a hexagon? The apothem (sometimes abbreviated as apo) of a regular polygon is a line segment from the center to the midpoint of one of its sides. Equivalently, it is the line drawn from the center
Posted on April 22, 2022 (Updated on July 9, 2025)
What does an optical interferometer measure?
Space & Navigationoptical interferometer, instrument for making precise measurements for beams of light of such factors as length, surface irregularities, and index of refraction. It divides a beam of light into a number of beams that travel unequal paths and whose intensities, when reunited, add or subtract (interfere with each other). What can an interferometer measure? Because
Posted on April 22, 2022 (Updated on July 9, 2025)
Where are asteroids hypothesized to have originated?
Space & NavigationAsteroids are thought to be leftovers from the formation of the solar system. Where are asteroids hypothesized to have originated? The Voyagers found new satellites and a thin ring around Jupiter. Where did asteroids originally come from? Asteroids are leftovers from the formation of our solar system about 4.6 billion years ago. Early on, the
Posted on April 22, 2022 (Updated on July 9, 2025)
What is sliding caliper?
Space & NavigationSliding caliper It is a variation of the floating caliper design, using a single piston and operating on the same principle – the piston applies pressure to one brake pad and the movable caliper applies pressure to the other. The caliper is held against a light source in this position. What is a sliding brake
Posted on April 22, 2022 (Updated on July 9, 2025)
What were sundials used for in ancient times?
Space & Navigationsundial, the earliest type of timekeeping device, which indicates the time of day by the position of the shadow of some object exposed to the sun’s rays. What was a sundial originally used for? World’s oldest known sundial, from Egypt’s Valley of the Kings (c. 1500 BC), used to measure work hours. How sundials were