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  2. Future of Earth - Wikipedia

    en.wikipedia.org/wiki/Future_of_Earth

    If not and there are still pockets of water left, and they evaporate too slowly, then in about 3–4 billion years, once the amount of water vapor in the lower atmosphere rises to 40%, and the luminosity from the Sun reaches 35–40% more than its present-day value, [94] a "runaway greenhouse" effect will ensue, causing the atmosphere to warm ...

  3. Burning plasma - Wikipedia

    en.wikipedia.org/wiki/Burning_plasma

    The Sun is a burning plasma that has reached fusion ignition, meaning the Sun's plasma temperature is maintained solely by energy released from fusion. The Sun has been burning hydrogen for 4.5 billion years and is about halfway through its life cycle.

  4. Timeline of the far future - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the_far_future

    The Sun's luminosity will have increased by 35–40%, causing all water currently present in lakes and oceans to evaporate, if it had not done so earlier. The greenhouse effect caused by the massive, water-rich atmosphere will result in Earth's surface temperature rising to 1,400 K (1,130 °C; 2,060 °F), which is hot enough to melt some ...

  5. Sun - Wikipedia

    en.wikipedia.org/wiki/Sun

    The Sun is the star at the center of the Solar System.It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies.

  6. Solar core - Wikipedia

    en.wikipedia.org/wiki/Solar_core

    The core contains 34% of the Sun's mass, but only 3% of the Sun's volume, and it generates 99% of the fusion power of the Sun. There are two distinct reactions in which four hydrogen nuclei may eventually result in one helium nucleus: the proton–proton chain reaction – which is responsible for most of the Sun's released energy – and the ...

  7. The sun just did something weird, and 3 other space stories ...

    www.aol.com/news/sun-just-did-something-weird...

    Space is very big and quite often, very weird. Last week, an image captured by NASA's Reconnaissance Orbiter looked just like a bear, and "The Green Comet" reached its closest point to Earth in ...

  8. Nuclear fusion - Wikipedia

    en.wikipedia.org/wiki/Nuclear_fusion

    The Sun is a main-sequence star, and, as such, generates its energy by nuclear fusion of hydrogen nuclei into helium. In its core, the Sun fuses 620 million metric tons of hydrogen and makes 616 million metric tons of helium each second. The fusion of lighter elements in stars releases energy and the mass that always accompanies it.

  9. Newly-released photos capture the sun in highest resolution ...

    www.aol.com/newly-released-photos-capture-sun...

    The European Space Agency released four stunning images last week that show the sun in all its fiery glory. The images, obtained in March 2023 by the ESA's Solar Orbiter, represent what the agency ...