Register to reply

Energy output of Sun?

by Holocene
Tags: energy, output
Share this thread:
Holocene
#1
Mar21-08, 07:42 PM
Holocene's Avatar
P: 231
Obviously life on Earth must get energy from the Sun. But MOST of the Suns energy must be radiating out into space, pretty much "wasted" from our perspective.

So, my question is, about how much energy do you figure the sun produces per second? What sort of things on Earth could be powered, and for how long, if at its disposal was all of the energy the sun could produce in just one second?
Phys.Org News Partner Astronomy news on Phys.org
Magnetar discovered close to supernova remnant Kesteven 79
Image: Hubble looks at light and dark in the universe
Mixing in star-forming clouds explains why sibling stars look alike
genneth
#2
Mar21-08, 08:04 PM
P: 980
I suggest putting into google the term (in quotes) "luminosity of the sun". It's something the astronomers have spent a good deal of time in measuring.
Astronuc
#3
Mar21-08, 09:01 PM
Admin
Astronuc's Avatar
P: 21,887
Here's one estimate -

3.846 1026 watts, or 3.846 1033 ergs/sec.

http://nssdc.gsfc.nasa.gov/planetary...t/sunfact.html

Compare that to the largest power plant have total energy generation of 3-5 GW.

DaveC426913
#4
Mar21-08, 10:50 PM
DaveC426913's Avatar
P: 15,319
Energy output of Sun?

Quote Quote by Holocene View Post
Obviously life on Earth must get energy from the Sun. But MOST of the Suns energy must be radiating out into space, pretty much "wasted" from our perspective.

So, my question is, about how much energy do you figure the sun produces per second? What sort of things on Earth could be powered, and for how long, if at its disposal was all of the energy the sun could produce in just one second?
I dunno, but the Global Warming Militants would have fits of apoplexy...
Ken G
#5
Mar22-08, 10:19 AM
PF Gold
P: 3,135
Quote Quote by Astronuc View Post
Here's one estimate -

3.846 1026 watts, or 3.846 1033 ergs/sec.

http://nssdc.gsfc.nasa.gov/planetary...t/sunfact.html

Compare that to the largest power plant have total energy generation of 3-5 GW.
Note that works out to over ten million such power plants per human on Earth. The cross section of the Earth intercepts less than a billionth of the Sun's energy, but that's still one such power plant for every few hundred humans. Accessing that energy efficiently is another matter...
ray b
#6
Mar22-08, 02:33 PM
P: 428
http://en.wikipedia.org/wiki/Dyson_sphere


Register to reply

Related Discussions
Java project output problem. Can't output objects from a method. Engineering, Comp Sci, & Technology Homework 0
Can u make if A>=B then output=1 Else output=0 using these logic gates? Advanced Physics Homework 7
How to get output voltage from the tachometer output Engineering Systems & Design 1
Energy in EM Waves problem (finding sun power output from EM wave intensity) Introductory Physics Homework 6
Pump output Introductory Physics Homework 6