Our Sun p2

Solar Flares
Our Sun 3.jpg

Above the photosphere lie the tenuous chromosphere and the corona (crown), which make up the thin solar atmosphere. This is where we see features such as sunspots and solar flares.


During total solar eclipses, when the moon covers the photosphere, the chromosphere looks like a red rim around the Sun, while the corona forms a beautiful white crown with plasma streamers narrowing outward, forming shapes that look like flower petals.

Sun Flare.jpg

Our Sun although the largest object in our solar system  is classed as a’Yellow Dwarf’, so although massive to us only a small star in the universe.

Average diameter (it constantly varies) is about 864,000 miles, about 109 times the size of the Earth.

93 million miles from Earth and you would need 1.3 million Earths to fill the Sun.

The Sun’s gravity holds our planets in their place.

Our Sun Cycle.jpg

Sun rotates as it orbits the center of the Milky Way.

Its spin has an axial tilt of 7.25 degrees with respect to the plane of the planets’ orbits.

Since the Sun is not a solid body, different parts of the Sun rotate at different rates.

At the equator, the Sun spins around once about every 27 days, but at its poles the Sun rotates once on its axis every 36 Earth days.


The Sun orbits the center of the Milky Way galaxy, bringing the planets, asteroids, comets, and other objects along with it. Our solar system is moving at an average velocity of 450,000 miles per hour (from UK to Australia in 6mins). But even at this speed, it takes us about 230 million years to make one complete orbit around the Milky Way.

Orbit Size Distance.png
Milky Way illustration


It is a hot ball of glowing gasses, made of 91.0% hydrogen and 8.9% helium.

By mass, the Sun is about 70.6% hydrogen and 27.4% helium.

six regions:

1. the core,

2. the radiative zone,

3. the convective zone in the interior;

4. the visible surface, called the photosphere;

5. the chromosphere; and

6. the outermost region, the corona.

Solar Flare 30th March 2022.jpg


credit - NASA