Science Space

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Summer solstice

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June 21 (or near). The summer solstice marks the longest period of daylight and marks the start of summer

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Winter solstice

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Occurs on December 21 (or near). The winter solstice marks the shorts day of the year and the start of winter

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Spring equinox

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March 21. Equal day and night

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Fall equinox

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Equal day and night

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Geocentric model

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The old model of planetary motion. The Earth centered model of the solar system

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Heliocentric model

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The new model to show the plants. The sun is at the center and the other plants orbit it

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Ellipse

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The orbital path of the planets travel around the Sun are ellipses. a circle is formed around one Focus

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Astronomical unit (AU)

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Is used for measuring "local" distances inside the solar system. One AU is equal to the distance from the centre of the earth to the center of the sun.

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Light year

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The distance that light travels in one year. Is used to measure distances between stars and galaxies

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Nebula

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Best clouds of gas mostly hydrogen and dust in space for stars form

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Interstellar matter

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The gas and dust that exists in the space between Stars

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Protostar

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The contracting mass of gas in the first stage of a stars formation

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Red giant

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The stage in the life cycle of a massive star during which the star increases in size and becomes very bright

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Red supergiant

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The stage in the life cycle of a massive star during which the start increases in size and becomes very bright

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White dwarf

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One of the latter stages in the life cycle of a sun-like star during which the star collapses

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Sun like star

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One of the two main types of stars that can form, the other being massive stars

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Black dwarf

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Final Phase in the life cycle of a sun-like star

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Supernova

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An enormous explosion that marks the death of a massive star

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Neutron star

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A small, super dense remnant of a supernova

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Black hole

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Superdance remained end of a supernova. An object which gravity is so intense that even light cannot Escape

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Constellation

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Are groupings if stars we see as patterns in the night sky

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Galaxy

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Is a grouping of millions or billions of stars, gas, and dust that is held together by gravity

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Solar wind

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Steams of electrically charged particles discharged by the sun in every direction

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Asteroids

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Small, rocky bodies orbiting the sun and lying mainly in a narrow belt between mars and Jupiter

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Comets

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"Dirty snowballs" are objects made up of dust and Ice that travel through space. They have tails and only glow when they are close to the Sun

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Meteoroids

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Small pieces of rocks flying through space with no particular path

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Meteorite

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The remains of a meteor that do not burn up completely and last long enough to hit Earth surface

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Meteor

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The meteoroid that enters Earth's atmosphere for the Heat and friction cause it to glow brightly

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Azimuth

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The angle between the most northern point of the Horizon and the point directly below and sensitive body

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Altitude

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The height of a celestial body above the horizon, ranging from 0 at sea level to 90° straight up

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Zenith

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Is the highest point directly ahead

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Ecliptic

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The apparent path of the sun and planets to the stars during the year as viewed from Earth

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Microgravity

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The condition in which the gravitational forces that act on a mass or greatly reduced

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Gravity

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The force of attraction between masses

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Satellite

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Small body that orbits a larger one satellites may be natural such as a moon orbiting a planet. or artificial such as a spacecraft put into orbit around Earth by humans for research for communication purposes

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Refracting telescope

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A type of optical telescope that uses two lenses to gather and focus light

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Hubble Space Telescope

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One of the largest most complex satellites ever built it was launched in 1990 and it uses a series of mirrors to focus light from extremely distant objects

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Electromagnetic energy

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Of radiated energy that travel at a speed of light although they have different wavelengths and frequencies than light

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Electromagnetic Spectrum

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The complete range of wavelengths over which electromagnetic energy extends

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Radio telescope

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A telescope system that collects analyzes radiation in the telescope frequency range from stars and other bodies in space

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Space probes

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Unmanned satellites are remote-controlled Landers used to explore areas are objects in space that are too difficult or dangerous to send humans to

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Triangulation

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A method of indirect measuring distance by creating an imaginary triangle between an observer and an object is distance away is to be estimated if you put cream

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Parallax

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Is the apparent shift in position of a nearby object when the object is viewed from two different places

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Doppler effect

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The apparent change in frequency of sound light and other waves as the Observer of the wave Source moves towards or away from each other