# data[].attributes.body
The speed of light is approximately 300,000 kilometers per second. One light year is about 9,500,000,000,000 kilometers.

# data[].attributes.body
composition

crust, mantle, and core

orbital distance from the sun

510.1 million km

size

510.1 million km^2

orbital periods

365 days

# data[].attributes.body
composition

Iron, nickel, and sulfur

orbital distance from the sun

142 million miles

1.5 astronomical units away from the Sun

size

4,212 miles (6,779 kilometers)

orbital periods

686.98 days

# data[].attributes.body
composition

70% metallic and 30% silicate material

orbital distance from the sun

43 million miles

size

3032 miles (diameter)

orbital periods

(Sidereal) 87.9691 days

(Synodic) 115.88 days

# data[].attributes.body
composition

Mostly hydrogen and helium

orbital distance from the sun

483 million miles (777 million km)

size

23.71 billion mi^2

orbital periods

11.86 years

# data[].attributes.body
composition

Central iron core and a rocky mantle

orbital distance from the sun

67 million miles

size

about 7,521 miles

orbital periods

(Sidereal)- 224.701 days

(Synodic)- 583.92 days

# data[].attributes.body
composition

water, methane, and ammonia

orbital distance from the sun

1.8 billion miles

size

31,763 miles

orbital periods

84 years

# data[].attributes.body
composition

hydrogen and helium

orbital distance from the sun

887 million miles

size

42.7 billion km

orbital periods

29.4 years

# data[].attributes.body
composition

water, methane, and ammonia

orbital distance from the sun

2,795,984,800 miles

size

7.618 billion km

orbital periods

165 years

# data[].attributes.body
composition

92.1% hydrogen and 7.9% helium

size

865,000 miles

orbital periods

225 million years

# data[].attributes.body
Main Sequence Stars:

Luminosity: High

Spectral: A, B, F, G, K, M

Evolutionary: Stable phase where hydrogen fusion occurs in the core, lasting for billions of years

Red Giants:

Luminosity: Very high

Spectral: K, M

Evolutionary: Late stage of stellar evolution when the star expands and cools after exhausting its hydrogen fuel

White Dwarfs:

Luminosity: Low

Spectral: A, B

Evolutionary: End stage of stellar evolution for low to medium-mass stars, the core collapses and becomes a very dense star

Neutron Stars:

Luminosity: Very high

Spectral: None (electromagnetic radiation is low or absent)

Evolutionary: Formed after a massive star undergoes a supernova explosion, leaving behind a very dense core made mostly of neutrons

Red Dwarfs:

Luminosity: Low

Spectral: M

Evolutionary: Low-mass and low-temperature stars that burn their fuel very slowly and have long lifetimes

Brown Dwarfs:

Luminosity: Very low

Spectral: L, T, Y

Evolutionary: Substellar objects that are not big enough to sustain hydrogen fusion in their cores, are considered failed stars

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Mercury to Sun: 0.39 AU

Venus to Sun: 0.72 AU

Earth to Sun: 1.00 AU

Mars to Sun: 1.52 AU

Jupiter to Sun: 5.20 AU

Saturn to Sun: 9.54 AU

Uranus to Sun: 19.22 AU

Neptune to Sun: 30.06 AU

# data[].attributes.body
Time it takes for light to reach Earth:

8 minutes and 20 seconds

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Time if takes for light to reach Earth:

8.61 years

# data[].attributes.body
Time it takes for light to reach Earth:

650 light years

# data[].attributes.body
Spiral Galaxies

Spiral galaxies have a spiral shape with arms radiating from a central nucleus.

Examples: Milky Way, Whirlpool Galaxy

Elliptical Galaxies

Elliptical galaxies have a smooth and extended appearance and range in size from almost circular to extremely elongated.

Examples: M87 galaxy, Virgo Cluster

Lenticular Galaxies

Lenticular galaxies lack identifiable spiral arms and resemble spiral and elliptical galaxies in appearance and disk-like structure.

Examples: Sombrero Galaxy, Cartwheel Galaxy

Irregular Galaxies

Irregular galaxies have a shape of uneven, chaotic, and lack a distinct structure.

Examples: Large and Small Magellanic Clouds

Active Galaxies

Active galaxies are galaxies that there are small emission nucleus embedded in the center of a typical galaxy

Examples: Radio Galaxies, Seyfert Galaxies, BL Lac Objects, Quasars for examples of active galaxies.

Seyfert Galaxies

Seyfert Galaxy is a galaxy of a type characterized by a bright compact core that shows strong infrared emission.

Example: NGC 1097

Quasars

Quasars are the blazing centers of active galaxies and are powered by a supermassive black hole feeding on humungous quantities of gas.

Example: TON 618

Blazars

Blazars are a type of galaxy powered by a ginormous black hole and among the brightest, most energetic object in the sky

Examples: 3C 454.3, 3C 273, BL Lacertae, PKS 2155-394, Markarian 421, Markarian 501, and S5 0014+81

# data[].attributes.body
Time it takes for light to reach Earth:

4.23 years

# data[].attributes.body
Time it takes for light to reach Earth:

11.8 years

# data[].attributes.body
Time it takes for light to reach Earth:

1600 years

# data[].attributes.body
Main Sequence Stars and Red Giant Stars

Main sequence stars fuse hydrogen. Red giants have run short of hydrogen

Red Dwarfs and Brown Dwarfs

Red dwarfs is like our Sun which is a low mass Star that fuse ordinary hydrogen. Brown dwarfs cannot fuse ordinary hydrogen but may fuse some other isotopes like deuterium.

White Dwarfs and Neutron Stars

White dwarf is an electron degenerate object. Neutron star is a neutron degenerate object,