Where does this come from, and can I check it?

Only a billionth of that energy reaches Earth. The figure is taken from NASA Sun, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a space fact?

Yes. It sits on the Space shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

The Sun emits about 384 yottawatts

Only a billionth of that energy reaches Earth The core fuses hydrogen at around 15 million kelvin, converting about 4 million tonnes of mass into energy every second. Energy takes tens of thousands of years to work outward through the interior. It then crosses the 150 million kilometre gap in about eight minutes. It sits in Mondo's space collection, one of 200 facts that each trace back to the reference below.

Where this comes from

NASA Sun

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

Go further

Science trivia

More facts like this

The Sun core converts 600 million tonnes of hydrogen every secondThermonuclear fusion transforms hydrogen nuclei into helium and energy A single solar flare releases millions of hydrogen bombs worth of energyMagnetic field reconnection on the Sun releases huge bursts of radiation Brown dwarfs are failed stars that cannot sustain core nuclear fusionSubstellar objects bridge the evolutionary gap between giant gas planets and stars The Sun holds nearly all the mass in the solar systemOver 99 percent of all matter in the solar system resides inside the Sun The Parker Solar Probe is the fastest human-made object ever builtSpeeds exceeding 600,000 kilometres per hour carry the probe near the Sun Total solar eclipses are possible due to a cosmic geometric coincidenceThe Sun is 400 times wider than the Moon but also 400 times further away

Tags: sun, energy, fusion

The Sun emits about 384 yottawatts: the short answers

Where does this come from, and can I check it?: Only a billionth of that energy reaches Earth. The figure is taken from NASA Sun, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a space fact?: Yes. It sits on the Space shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.