平壹塵提示您：看后求收藏（詩鼎小說網網m.gzstf.cn），接著再看更方便。

<h1>dark

grey

star</h1>

dark

grey

star

The

age

of

the

universe

is

13.8

billion

years,

and

the

diameter

is

about

93

billion

light-years

The

Pisces-Cetus

Supercluster

plex

is

1

billion

light-years

long

and

150

million

light-years

wide.

The

Laniakea

super

gaxy

has

a

diameter

of

520

million

light-years

and

tains

100,000

gaxies.

The

Virgo

Supercluster

is

100

million

light-years

in

diameter

and

tains

47,000

gaxies.

The

Local

Group

of

Gaxies

is

10

million

light-years

in

diameter

and

tains

50

gaxies

The

Andromeda

Gaxy

is

220,000

light-years

in

diameter

and

has

1

trillion

stars.

The

Milky

Way

is

180,000

light-years

in

diameter

and

has

400

billion

stars.

What

is

the

cept

of

light

year

only

used

units

in

astronomy

are

parsecs,

astronomical

units

and

light

seds

An

astronomical

unit

is

149,597,870,700

meters

A

light

sed

is

the

distaraveled

by

light

in

one

sed

and

is

299,792,458

meters.

A

light-year

is

9,460,528,177,426.821

meters.

One

parsec

equals

3.26

light

years

The

speed

of

the

earth'