The Sun is becoming increasingly hotter (or more luminous) with time. … Astronomers estimate that the Sun’s luminosity will increase by about 6% every billion years. This increase might seem slight, but it will render Earth inhospitable to life in about 1.1 billion years. The planet will be too hot to support life.

Is the sun increasing in brightness?

The sun has been increasing its brightness by about 10% every billion years it spends burning hydrogen. Increased brightness means an increase in the amount of heat our planet receives. As the planet heats up, the water on the surface of our planet will begin to evaporate.

Is the sun brighter this time of year?

Actually, the sun continues to get brighter through the fall and into January, when the sun is at its brightest, because that’s when Earth is closest to the sun.