Русский New site

Advanced search

[ New messages · Forum rules · Members ]
Page 1 of 11
Forum » SpaceEngine » General Discussions » What would the density of this planet be?
What would the density of this planet be?
smjjamesDate: Monday, 01.10.2012, 15:27 | Message # 1
World Builder
Group: Users
United States
Messages: 913
Status: Offline
I saw this one that was 9 earth masses, 2.3 times the diameter, and yet only 1.6g, so I got to wondering how dense is this planet. I'm not sure how to calculate the density there, so, yea, that's why I'm asking.


Attachments: 7193067.jpg(123Kb)





 
apenpaapDate: Monday, 01.10.2012, 15:39 | Message # 2
World Builder
Group: Users
Antarctica
Messages: 1063
Status: Offline
Density is mass divided by volume. So first you've got to get the mass in kilograms. Since an Earth mass is 5972 Yottagrams (6*10^24 kilograms), 9.02 of them equals 5.39*10^25 kg.

The volume of a sphere 4/3*pi*the cube of its radius, so 15103000^3*pi*4/3=8.12*10^21 cubic metres.

(5.39*10^25)/(8.12*10^21)=6638 kg/m^3. This is 6.6 kg/l, so it's a little denser than Earth, but not much.





I occasionally stream at http://www.twitch.tv/magistermystax. Sometimes SE, sometimes other games.
 
smjjamesDate: Monday, 01.10.2012, 15:53 | Message # 3
World Builder
Group: Users
United States
Messages: 913
Status: Offline
Oh, I was figuring it had a larger core since it's a super-earth in mass, but wasn't sure about overall density.




 
Forum » SpaceEngine » General Discussions » What would the density of this planet be?
Page 1 of 11
Search: