Univese and Solar System

Cosmology

It is the branch of astronomy studying the origin, structures, and evolution of the universe.

Astronomy

It is the branch of science studying the celestial objects, space, and the totality of the universe.

Universe

It is composed of all time and space made up of millions of stars, planets, nebular clouds, and etc. separated by space.

Big Bang Theory

It states that all matter and energy of the universe was compressed into an extremely small column and had continued expanding and stretching up until now.

1927

It is the year the Big Bang Theory was formed.

13.7 Billion Years

It is the approximate age of the universe.

Georges Lemetre

He is the proponent of the Big Bang Theory.

Cosmological Redshift

It is one of the evidence of the Big Bang theory where the light from farther galaxies seem to shift towards the red of the spectrum; it also helps determine the speed of galaxies moving away.

Edwin Hubble

He is the scientist who discovered and used redshift to confirm the expansion of the universe.

Hubble’s Law

It is the law stating that galaxies recede at speeds proportional to their distance from the reference point to their current position.

Cosmic Microwave Background Radiation

It is one of the evidences of the Big Bang which is the thermal leftover radiation formed when the hot universe cooled enough for atoms to combine.

Blue

It is the color used by CMB to represent parts of the universe with little or less temperature.

Red

It is the color used by CMB to represent parts of the universe with higher or more temperature.

Robert Wilson and Arno Renzias

They are the scientists who introduced CMB in 1978.

Space Ripples

These are irregularities in CMB caused by small flunctuations in distribution of matter in the early universe.

Abundance of Light Elements

This is one of the evidences of the Big Bang where actual measurement of hydrogen and helium matched the expected outcome of the Big Bang.

Galaxies

These are the group of stars, gases, and dusts bound by gravity.

Barred Spiral Galaxy

It is the Milky Way’s shape which is also a form of spiral galaxies.

Milky Way

This is the home of the solar system and is aproximately made up of 100 billion stars.

Spiral Galaxy

It is a shape of galaxy where its forces are in the center.

Bulge, Disk, and Halo

These are the main components of the spiral galaxy.

Elliptical Galaxy

It is the galaxy with no definite shape and center.

Irregular Galaxy

It is an other term for the elliptical galaxy.

Interstellar Matter

These are the “stuff” filling the space between stars and galaxies.

Nebulae

These are the clumps and strands of interstellar matter formed due to gravity which have no distinct edges or boundaries.

Bright Nebulae

It is a type of nebulae in close proximity of very bright stars.

Dark Nebulae

It is the type of nebulae far from very bright stars.

25k Light-years

It is the approximate distance of the solar system from the center of the galaxy.

4.5 Billion Years

It is the approximate age of the sun and its planets.

Geocentrism

It is the model of the solar system where the Earth is at the center of the universe and other celestial bodies revolve around it.

Aristotle and Ptolemy

They are the main supporters of geocentrism.

Heliocentrism

This is the model of the universe where the sun is at the center of the universe.

Aristarchus of Samos

He is the pioneer of heliocentrism.

Nicolas Copernicus

He is the main supporter of heliocentrism who provided distinct explanations of the model.

23.5 Degrees

It is the measure of the Earth’s tilted axis.

Axis

It is the imaginary “stick” causing Earth’s tiltation.

Orbital Plane

It is the fabric of space where the sun and its planets are located.

Galactic Year

It is the revolution of the solar system around the Milky Way.

20

It is the approximate number of Earth’s galactic years.

Nebular Hypothesis

It is the most widely accepted explanation for how the solar system formed.

Terrestrial Planets

These are the solid and rocky planets.

Goldilocks Zone

This is the zone where Earth is located in which its factors are just enough to sustain life.

Gas Giants

These are the planets with large ring systems made out of ice, rocks, or both.

Jovial Planets

These are the planets classified as ice giants.

Asteroid Belt

It is the region of space rocks left over from the formation of planets.

Kuiper Belt

It is the region of icicles marking the boundary of the solar systems.

150

It is the approximate number of moons in the solar system.

Moons

These are the natural satellites of the universe.

Luna

It is the name of Earth’s moon.

Phobos and Deimos

These are the names of Mars’ moons.

79

This is the number of moons Jupiter has.

62

This is the number of moons Saturn has.

27

This is the number of moons Uranus has.

14

This is the number of moons Neptune has.

Charon

This is the name of Pluto’s moon.

Exosphere

It is the extremely thin covering of oxygen, hydrogen, sodium, helium, and potassium Mercury has.

Carbon Dioxide

The main component of Venus and Mars’ atmosphere.

Hydrogen and Helium

These are the main components of Jupiter, Saturn, Uranus, and Neptune’s atmosphere.

Nitrogen and Oxygen

These are the elements Earth’s atmosphere has which shields from harmful sun radiations and celestial bodies’ impact.