Dark Grey Planet 01

Dark   Grey   Planet   01

Warm,   cold   and   hot   near   the   stars,

Four   seasons   of   spring,   summer,   autumn   and   winter,

The   billowing   dust   lay,

Yin   and   Yang   all   things   turn   into   virtual   clouds.

The   age   of   the   universe   is   13.8   billion   years,   and   the   diameter   is   about   93   billion   light-years

The   Pisces-Cetus   Supercluster   complex   is   1   billion   light-years   long   and   150   million   light-years   wide.

The   Laniakea   super   galaxy   has   a   diameter   of   520   million   light-years   and   contains   100,000   galaxies.

The   Virgo   Supercluster   is   100   million   light-years   in   diameter   and   contains   47,000   galaxies.

The   Local   Group   of   Galaxies   is   10   million   light-years   in   diameter   and   contains   50   galaxies

The   Andromeda   Galaxy   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   concept   of   light   year

Commonly   used   units   in   astronomy   are   parsecs,   astronomical   units   and   light   seconds

An   astronomical   unit   is   149,597,870,700   meters

A   light   second   is   the   distance   traveled   by   light   in   one   second   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\'s   movement   around   the   sun   is   29.79   kilometers   per   second,

The   speed   of   the   sun   in   the   Milky   Way   is   240   kilometers   per   second,

The   speed   of   the   Milky   Way   in   the   universe   is   600   kilometers   per   second,

The   Juno   space   probe   has   a   top   speed   of   265,000   kilometers   per   hour,

It   would   take   about   4075   Earth   years   to   travel   a   distance   of   1   light-year   with   Juno,

If   Juno   were   to   fly   to   the   closest   habitable   planet   to   Earth,

It   takes   17115   Earth   years   to   reach   Proxima   b,   4.2   light-years   away,

It   takes   48512   Earth   years   to   reach   Tiancang   5e,   which   is   11.905   light-years   away,

It   takes   56,235   Earth   years   to   reach   Wolf   1061c,   which   is   13.8   light-years   away,

It   takes   65199   Earth   years   to   reach   Gris   832c,   which   is   16   light   years   away,

It   takes   83536   Earth   years   to   reach   Gris   581g,   which   is   20.5   light-years   away,

It   takes   92502   Earth   years   to   reach   Gris   667,   which   is   22.7   light-years   away,

To   reach   Gliese   667   Cc   at   24   light   years,   it   would   take   97800   Earth   years,

To   reach   Trapp-1   at   39.13   light-years,   it   would   take   159,454   Earth   years,

To   HD   40307   g   at   42   light   years,   it   would   take   171149   Earth   years,

It   takes   199,674   Earth   years   to   reach   Gris   163c,   which   is   49   light-years   away,

It   takes   452,325   Earth   years   to   reach   K2-18b   in   Leo,   which   is   111   light-years   away,

To   reach   Kepler   438b,   which   is   470   light   years   away,   it   will   take   1915250   Earth   years,

To   reach   Kepler   186f,   which   is   500   light-years   away,   it   will   take   2,037,500   Earth   years,

It   takes   2,445,000   Earth   years   to   reach   Kepler   22b,   which   is   600   light-years   away,

KOI-4878.01   to   1075   light-years,   requires   4380624   Earth

To   reach   Kepler   62f   at   1,200   light-years,   it   would   take   4,890,000   Earth   years,

It   takes   5,705,000   Earth   years   to   reach   Kepler   452b,   which   is   1,400   light-years   away,

To   reach   Kepler   69c   at   2700   light   years,   it   will   take   11002500   Earth   years,

36,000   light-years   from   Earth,

The   Smith   Cloud,   8,000   light-years   from   the   Milky   Way\'s   galactic   disk,

It   is   a   huge   extragalactic   high-speed   hydrogen   cloud   in   the   constellation   Aquila,

The   shape   of   the   Smith   Cloud   is   somewhat   similar   to   that   of   a   comet,

It   is   9800   light-years   long,   3262   light-years   wide,   and   has   a   mass   equivalent   to   at   least   one   million   suns.

At   this   moment,

The   Smith   cloud   is   at   an   angle   of   45   degrees,

At   a   speed   of   241   kilometers   per   second,   it   hit   the   Perseus   arm   of   the   Milky   Way,

At   the   same   time,

The   Andromeda   Galaxy   is   220,000   light-years   in   diameter

is   swallowing   a   large   number   of   neighboring   Triangulum   galaxies   with   a   diameter   of   60,000   light-years,

And   it\'s   expanding...

Expanding   step   by   step...