Equivalents

 

1 mm        =     .039 inch

              =     .1 cm

1 inch       =     2.54 cm

              =     25.4 mm

1 foot       =     304.8 mm

8 inches     =     203.2 mm

              =     20.32 cm

              =     .20 m

1 mile       =     1.61 km

1 meter     =     100 cm

              =     1000mm

              =     3.28 feet

              =     39.37 inches

              =     1.09 yard

1 km        =     3280.8 feet

              =     .621 mile

1 Å          =     10-10 m

              =     .1 nm

1 nm        =     10 Å

1 micron    =     1 x 10-6 m

1 AU        =     1.5 x 1011 m

              =     499 light secs

1 ly         =     9.46 x 1012 km

              =     9.46 x 1015 m

                   =     5.88 x 1012 mile

              =     .31 pc

              =     63,239.8 AU

1pc          =     3.1 x 1016 m

              =     3.26 ly

              =     206,264.8 AU

              =     1.92 x 1013 mile

1 naut mile =     1.15 stat mile

              =     6076 feet

Data

1 day       =     86,400 sec

1 syn mon   =     29.53 day

1 sid mon   =     27.32 day

1 year      =     365.25 day

              =     31,557,600 sec

c             =     2.99 x 108 m/sec

Planck, h    =     6.62607 x 10-34 J.s

G            =     6.674 x 10-11 N.m2/kg2

Electron     =     9.10938 x 10-31 kg

Proton       =     1.672622 x 10-27 kg

Neutron     =     1.674927 x 10-27 kg

Sun:

Mass        =     1.9891 x 1030 kg

Temp        =     5780 K

Radius       =     696,265 km

Output      =     3.85 x 1026 W

1 AU flux   =     1.37 kW/m2

Wavelengths:

Violet       =     420 nm

Blue         =     470 nm

Green       =     530 nm

Yellow       =     580 nm

Orange      =     610 nm

Red          =     660 nm

Moon:

New                       Rises Sunrise,     Sets Sunset

1st Quarter Rises        Noon,              Sets Midnight

Full                        Rises Sunset,      Sets Sunrise

Last Quarter            Rises Midnight,    Sets Noon