Imagine human race witnesses star explosion 1000 A.D. suppose we know explosion occurred 3000 light years from earth. When did the explosion actually take place? a)1000 B.C b) 2000 B.C. c) 3000 B.C 2000 B.C. Which particle is not an elementary particle a) proton b) neutron c) electron Neutron Which Read more…
Parsec The distance at which a star must lie in order for its measured parallax to be exactly 1 arc second. Proper Motion The angular movement of a star across the sky, as seen from earth, measured in seconds of arc per year. Apparent Brightness The brightness that a star Read more…
It is much easier to build large reflectors than large refractors True The light gathering ability of a telescope is most dependent on the diameter of its primary objective (collecting area) True One reason for building telescopes on mountain tops is that they improve seeing by reducing the amount of Read more…
Abberation A refracting telescope is subject to chromatic _______. Lenses A refracting telescope uses _______ to form an image. Mirrors A reflecting telescope uses _______ to form an image. Inferometry Linking separate telescopes so they act as one telescope producing more detailed images Wave Light is described as a particle Read more…
Earth Science The study of the earth and its containing environment (The Universe) 4 Major Branches of Earth Science: Geology, oceanography, meteorology, and astronomy Geology The study of the origin, history, and structure of the solid earth and the processes that shape it (solid and molten inner and outer earth) Read more…
Explain the difference between Astronomy and Astrology Astronomy is the study of the universe while Astrology is a belief system that includes the idea that stars can tell events in your life. What’s the difference between mass and weight? Mass is the amount of matter in someone while weight is Read more…
What is the big bang theory? The universe was born from some sort of explosion. Everything is moving away from a central point and the furthest galaxies are still accelerating. Light Year -how far? 300000km/s * 365 days* 24hr * 60min * 60sec Doppler Effect As an object speeds towards Read more…
light electromagnetic radiation light and matter interact through emission, absorption, transmission, reflection/scattering light as a particle individual components of light (photons) carry energy light as a wave produces interference patterns (double slit experiment) speed equation wavelength x frequency = speed energy equation Planck’s constant x speed of light % wavelength Read more…
astronomy The student of all physical subjects beyond Earth. The study of the universe. light year Distance light travels in one year. (about 6 trillion miles or 9 trillion kiolmeters) Ptolemy An ancient astronomy that believed that the Earth was the center of the universe. Copernicus An ancient astronomy that Read more…
What are stars? -large balls of hot gas -they look small because they are far away -stars are bigger and brighter than Sun -they vary in size and color Where is the heat of the star made? the heat of the star is made in the center by nuclear fusion Read more…
Thales ., “Father of Western Philosophy”. Greek philosopher who taught that the universe had originated from water. Anaximander ., Achievement in Zoology. Proposed a theory that animals evolved from an earlier life form. Believed that all living things came from the water and that humans came from the earliest sea Read more…
absorption spectrum the spectrum formed by electromagnetic radiation that has passed through a medium in which radiation of certain frequencies is absorbed. aurora Meteorology. a radiant emission from the upper atmosphere that occurs sporadically over the middle and high latitudes of both hemispheres in the form of luminous bands, streamers, Read more…
solar eclipse the phenomenon in which the shadow of the Moon falls on Earth’s surface umbra the inner shadow of Earth dwarf planet a celestial body that has similar characteristics to a planet but doesn’t fit the criteria geocentric model a model in which the Earth is the centre of Read more…
Zenith Top of sky above your head Nadir Bottom of sky below your feet Celestial poles Located directly above earths north and south poles Zodiac 13 constellations that follow the ecliptic Ecliptic The path the sun travels. (Passes through Zodiac) Eastward The earth spins about its axis in what direction? Read more…
Johannes Kepler Astronomer who in the 1600’s, discovered that objects in the universe all orbit each other in elliptical paths, not perfect circles. Developed three mathematical laws of elliptical planetary motion Kepler’s 1st Law Objects in the universe that orbit other objects, follow elliptical paths. The object being orbited resides Read more…
Solar System includes all of the planets, moons, and other objects that revolve around a star Planet a large space object that moves in a curved path around a star, such as our sun Inner Planets in order of distance from closest to the sun to farthest from it: Mercury, Read more…
What kind of spectrum is this? Continuous spectra Continuous spectra are produced from hot solids or dense gases What kind of spectrum is this? Emission spectra Emission spectra are produced from hot gases What kind of spectrum is this? Absorption spectra Absorption spectra are produced from cool gases Doppler Effect Read more…
What is the summer solstice? June 21st. Ecliptic where sun is at its northernmost point and hitting the tropic of cancer Winter Solstice? When sun is directly hitting tropic of capricorn and southernmost in the sky Vernal equinox? Sun is directly hitting equator. Every place on earth has equal night Read more…
O stars Hottest blue-white stars with few lines Strong He II absorption (sometimes emission) lines He I absorption lines becoming stronger B stars Hot blue-white He I absorption lines strongest at B2 H I (Balmer) absorption lines getting stronger A stars White Balmer absorption lines strongest at A), becoming weaker Read more…
Astronomy the scientific study of the universe. astronomy first historically coined by the ancient Greeks in 600 BC. The etymology of the word astronomy comes from the Greek words meaning star arrangement (astron) and regulation (nomos). The scientific branch of astronomy encompasses the objects and relationships in space, including, but Read more…