Sun's Mass Loss: 4 Billion kg/sec from Sunlight & Ejected Particles

In summary: Most of us here probably have jobs too and are short on time (and some of us are building a business with what little bit of free time we've got!), so good thing for the vigilance of people about the basics of proper thanking.Thank you for your input. In summary, the sun loses 4 billion kg per second worth of sunlight in e = mc².
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syfry
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TL;DR Summary
How much mass per second does the sun lose with all the sunlight it emits and all the particles it ejects?
Found out the sun loses 4 billion kg per second worth of sunlight in e = mc².

How much mass does the sun lose per second if we include all particles that the sun ejects such as ions and neutrinos? (and, neutrons?)
 
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  • #2
Per wiki, the Sun loses about 1.3-1.9 million tons per second due to the solar wind. Or about 1.3-1.9 billion kg per second. So sunlight plus solar wind gives about 5.3-5.9 billion kg of mass loss per second. Quite a bit, but miniscule on the scale of the Sun. Since the formation of the Sun, this equates to perhaps 0.05% of its initial mass.
 
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  • #3
Drakkith said:
Per wiki, the Sun loses about 1.3-1.9 million tons per second due to the solar wind. Or about 1.3-1.9 billion kg per second. So sunlight plus solar wind gives about 5.3-5.9 billion kg of mass loss per second. Quite a bit, but miniscule on the scale of the Sun. Since the formation of the Sun, this equates to perhaps 0.05% of its initial mass.
Does solar wind include the coronal mass ejections? 🤔

Also there's still the neutrinos to account for.

Wasn't expecting sunlight to outweigh the particles lost! So maybe the mass lost from ejected particles is even greater if the neutrinos add sufficiently, and, after including mass ejections (if solar wind is only part of the total).
 
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Photons are particles.
 
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  • #5
Drakkith said:
Per wiki, the Sun loses about 1.3-1.9 million tons per second due to the solar wind. Or about 1.3-1.9 billion kg per second. So sunlight plus solar wind gives about 5.3-5.9 billion kg of mass loss per second. Quite a bit, but miniscule on the scale of the Sun. Since the formation of the Sun, this equates to perhaps 0.05% of its initial mass.
Interesting.
Which is on the order of the mass of the moon, give or take, since the sun's formation.
 
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syfry said:
Does solar wind include the coronal mass ejections? 🤔

Also there's still the neutrinos to account for.
I'm sorry, I think you made a typo. I think you meant "Thank you for looking those numbers up for me."

Do you have a larger point? That can be discussed.
 
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  • #7
Vanadium 50 said:
I'm sorry, I think you made a typo. I think you meant "Thank you for looking those numbers up for me."

Do you have a larger point? That can be discussed.
You're right about showing thanks, as I often do. (and was first to like 👍 their reply)

Also feel fine about my follow up. By the way, thanks @Drakkith, if it wasn't obvious. I often am tired from physical labor and driving hundreds of kilometers to jobs even after pulling over to sleep in the car so I'm often sleep deprived and might forget to mention it, but please know that I do appreciate your effort. Last night I awoke in the middle of he night as usual and got to wondering things about the science of how our universe works (also, as usual), then found a PBS video that said the amount of sunlight in a year, and hadn't ever found online a grand total of all mass that the sun loses to all the things we hear about: trillions of neutrinos through our bodies per second, the mass ejections the sun unleashes (are those ejections in all directions from the sphere, or only into the plane of planets, and, if they're only from a single spot, then do we include the mass ejections that happen at the other side of the sun away from us?), etc. But do we subtract all of the mass that collides with the sun from asteroids to comet debris and would add to its mass? (or would the solar wind be so strong near the sun that such objects cannot enter it?)

Most of us here probably have jobs too and are short on time (and some of us are building a business with what little bit of free time we've got!), so good thing for the vigilance of people about the basics of proper thanking.

I thought in our quest and curiosity for scientific knowledge, we're all in it together!

Why else would people bother to answer any questions that complete strangers ask on the internet?
 
  • #8
Vanadium 50 said:
I'm sorry, I think you made a typo. I think you meant "Thank you for looking those numbers up for me."

Do you have a larger point? That can be discussed.
He did "like" the post and I thought that his question was a natural continuation of the discussion.
 
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  • #9
syfry said:
Does solar wind include the coronal mass ejections?
No idea. I don't know how it was calculated. I'd be curious about what it does and doesn't include, and how the solar wind changes over time.
 
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FAQ: Sun's Mass Loss: 4 Billion kg/sec from Sunlight & Ejected Particles

What causes the Sun to lose mass at a rate of 4 billion kg per second?

The Sun loses mass primarily through two processes: nuclear fusion and the solar wind. In nuclear fusion, hydrogen atoms combine to form helium, releasing energy in the process, which results in a slight loss of mass according to Einstein's equation E=mc². Additionally, the solar wind, which consists of charged particles ejected from the Sun's outer layers, contributes to this mass loss. Together, these processes account for the significant mass loss observed.

What is the significance of the Sun's mass loss for its lifecycle?

The Sun's mass loss is significant as it affects its lifecycle and evolution. Over billions of years, the gradual loss of mass will lead to changes in the Sun's gravitational pull on the planets, potentially altering their orbits. Eventually, as the Sun continues to lose mass, it will transition into its later stages, culminating in its transformation into a red giant and then a white dwarf, significantly impacting the solar system.

How does the mass loss of the Sun affect Earth and the other planets?

The mass loss of the Sun leads to a gradual decrease in its gravitational pull, which can affect the orbits of Earth and other planets over long timescales. However, the effect is very minimal and would take billions of years to result in any significant changes. In the short term, the solar mass loss does not have a direct impact on Earth's climate or conditions, but it is an important factor in the long-term evolution of the solar system.

Is the rate of mass loss from the Sun constant, or does it vary?

The rate of mass loss from the Sun is not entirely constant; it can vary based on solar activity. During periods of high solar activity, such as solar flares and coronal mass ejections, the solar wind can become more intense, leading to an increased rate of mass loss. Conversely, during quieter periods of solar activity, the mass loss rate may decrease. However, on average, the mass loss is estimated to be around 4 billion kg per second.

How do scientists measure the Sun's mass loss?

Scientists measure the Sun's mass loss using a combination of observational data and theoretical models. They analyze the solar wind's properties, such as its speed and density, using spacecraft that are equipped with instruments to detect solar particles. Additionally, they use observations of the Sun's luminosity and energy output to estimate the mass loss from nuclear fusion processes. By combining these measurements, scientists can calculate the overall mass loss rate of the Sun.

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