3-D: Brief for three-dimensional. This time period is an adjective for one thing that has options that may be described in three dimensions — peak, width and size.
astrophysics: An space of astronomy that offers with understanding the bodily nature of stars and different objects in house. Individuals who work on this discipline are referred to as astrophysicists.
Massive Bang: The speedy enlargement of dense matter that, in response to present principle, marked the origin of the universe. It’s supported by astronomers’ present understanding of the composition and construction of the universe.
colleague: Somebody who works with one other; a co-worker or staff member.
cosmic: An adjective that refers back to the cosmos — the universe and every part inside it.
cosmologist: A scientist who research the origin and growth of the cosmos, or universe.
darkish matter: Bodily objects or particles that emit no detectable radiation of their very own. They’re believed to exist due to unexplained gravitational forces that they seem to exert on different, seen astronomical objects.
filament: One thing with a skinny, thread-like form. As an example, the delicate steel wire that heats as much as emit mild inside an incandescent mild bulb is named its filament.
pressure: Some exterior affect that may change the movement of a physique, maintain our bodies shut to 1 one other, or produce movement or stress in a stationary physique.
galaxy: A gaggle of stars — and often darkish matter — all held collectively by gravity. Big galaxies, such because the Milky Manner, usually have greater than 100 billion stars. The dimmest galaxies could have just some thousand. Some galaxies even have gasoline and mud from which they make new stars.
galaxy cluster: A gathering of many galaxies held shut to 1 one other by gravity.
light-year: The gap mild travels in a single yr, about 9.46 trillion kilometers (nearly 6 trillion miles). To get some thought of this size, think about a rope lengthy sufficient to wrap across the Earth. It could be a bit of over 40,000 kilometers (24,900 miles) lengthy. Lay it out straight. Now lay one other 236 million extra which can be the identical size, end-to-end, proper after the primary. The entire distance they now span would equal one light-year.
mass: A quantity that reveals how a lot an object resists dashing up and slowing down — principally a measure of how a lot matter that object is made out of.
matter: One thing that occupies house and has mass. Something on Earth with matter could have a property described as “weight.”
moon: The pure satellite tv for pc of any planet.
perpendicular: An adjective that describes two issues which can be located roughly 90 levels to one another. Within the letter “T,” the highest line of the letter is perpendicular to the underside line.
simulation: (v. simulate) An evaluation, usually made utilizing a pc, of some situations, capabilities or look of a bodily system. A pc program would do that through the use of mathematical operations that may describe the system and the way it would possibly change over time or in response to totally different anticipated conditions.
star: The fundamental constructing block from which galaxies are made. Stars develop when gravity compacts clouds of gasoline. Once they develop into sizzling sufficient, stars will emit mild and typically different types of electromagnetic radiation. The solar is our closest star.
principle: (in science) An outline of some side of the pure world primarily based on in depth observations, assessments and motive. A principle may also be a method of organizing a broad physique of information that applies in a broad vary of circumstances to elucidate what is going to occur. Not like the frequent definition of principle, a principle in science isn’t just a hunch. Concepts or conclusions which can be primarily based on a principle — and never but on agency information or observations — are known as theoretical. Scientists who use arithmetic and/or current information to venture what would possibly occur in new conditions are referred to as theorists.
torque: A pressure that produces rotation, twisting or turning.
universe: Your entire cosmos: All issues that exist all through house and time. It has been increasing since its formation throughout an occasion referred to as the Massive Bang, some 13.8 billion years in the past (give or take a number of hundred million years).
velocity: The velocity of one thing in a given course.