## Impressive accuracy...

Discussion around the Swiss Micros DM42 calculator.
mcc
Posts: 235
Joined: Fri Jun 23, 2017 5:10 am

### Impressive accuracy...

Hi,

ok, this is neither correct in a mathematical nor in a scientific way but it still impresses me a lot.
Suppose we would know that the age of the universe is exactky 13.81E9 years.
Furthermore suppose the speed of light would be exactly 300e9m/s.
And suppose dark matter would not exist, the universe would be a perfect vaccum and had expanded with
the speed of light since the Big Bang (and forget about parallel universes, the Einstein/Rosen bridges, black holes,
white dwarfs, gravity waves and other minor annoyances...)

Then...
The accuracy of our beloved DM24 is be good enough to determine the circumfence of the universe at
this very moment down to a milimeter.

WHOW!

Cheers!
Meino
DM 42 - SN: 00373, Firmware release v.:3.16. / DMCP 3.20. as compiled by SwissMicros
keithdalby
Posts: 564
Joined: Mon Apr 24, 2017 8:38 pm

### Re: Impressive accuracy...

mcc wrote:
Mon Dec 25, 2017 8:43 pm
suppose the speed of light would be exactly 300e9m/s
You can suppose that, if you like, but it's a wee bit fast
Walter
Posts: 1724
Joined: Tue May 02, 2017 11:13 am
Location: Close to FRA, Germany

### Re: Impressive accuracy...

mcc wrote:
Mon Dec 25, 2017 8:43 pm
And suppose dark matter would not exist, the universe would be a perfect vaccum and had expanded with
the speed of light since the Big Bang (and forget about parallel universes, the Einstein/Rosen bridges, black holes,
white dwarfs, gravity waves and other minor annoyances...)
White dwarfs? Heard about brown dwarfs and red giants, but white ...?
DM42 SN: 00041 β
WP 43S running on this device

HP-35, HP-45, ..., HP-35S, WP 34S, WP 31S, DM16L
keithdalby
Posts: 564
Joined: Mon Apr 24, 2017 8:38 pm

### Re: Impressive accuracy...

Walter wrote:
Mon Dec 25, 2017 9:25 pm
White dwarfs?
They're a thing. Really dense, but no fusion. Just residual heat radiated.
Walter
Posts: 1724
Joined: Tue May 02, 2017 11:13 am
Location: Close to FRA, Germany

### Re: Impressive accuracy...

keithdalby wrote:
Mon Dec 25, 2017 9:28 pm
Walter wrote:
Mon Dec 25, 2017 9:25 pm
White dwarfs?
They're a thing. Really dense, but no fusion. Just residual heat radiated.
Must be talking about brown dwarfs. No major fusion, internal heat suffices for IR radiation only.
DM42 SN: 00041 β
WP 43S running on this device

HP-35, HP-45, ..., HP-35S, WP 34S, WP 31S, DM16L
keithdalby
Posts: 564
Joined: Mon Apr 24, 2017 8:38 pm

### Re: Impressive accuracy...

Walter wrote:
Mon Dec 25, 2017 9:37 pm
keithdalby wrote:
Mon Dec 25, 2017 9:28 pm
Walter wrote:
Mon Dec 25, 2017 9:25 pm
White dwarfs?
They're a thing. Really dense, but no fusion. Just residual heat radiated.
Must be talking about brown dwarfs. No major fusion, internal heat suffices for IR radiation only.
Except white dwarfs are hot enough to emit visible radiation, I guess. Working from memory here.
Thomas Okken
Posts: 802
Joined: Tue May 02, 2017 5:48 pm
Location: United States
Contact:

### Re: Impressive accuracy...

A white dwarf is a burned-out star that is too light to become a neutron star.
https://en.wikipedia.org/wiki/White_dwarf
keithdalby
Posts: 564
Joined: Mon Apr 24, 2017 8:38 pm

### Re: Impressive accuracy...

Thanks Thomas, just finished reading that now.
Walter
Posts: 1724
Joined: Tue May 02, 2017 11:13 am
Location: Close to FRA, Germany

### Re: Impressive accuracy...

... me as well.
DM42 SN: 00041 β
WP 43S running on this device

HP-35, HP-45, ..., HP-35S, WP 34S, WP 31S, DM16L
mcc
Posts: 235
Joined: Fri Jun 23, 2017 5:10 am

### Re: Impressive accuracy...

Hi,

...interesting which turn this discussion did...
DM 42 - SN: 00373, Firmware release v.:3.16. / DMCP 3.20. as compiled by SwissMicros