Our Sun is tiny in comparison to some stars.

Summary

The article discusses the immense size of the star Stephenson 2–18 compared to the Sun, and its potential impact on our Solar System if it were to replace the Sun.

Abstract

The Sun, a G-type main-sequence star, is central to our Solar System and life on Earth, yet it is relatively average in size compared to other stars. Stephenson 2–18, one of the largest known stars, dwarfs the Sun with a diameter approximately 2,150 times greater. Located 18,900 light-years away, this star's sheer size is difficult to comprehend, but if it were to take the Sun's place, it would likely engulf the inner planets of our Solar System and possibly even Saturn. The article emphasizes the vastness of the universe and the limitations imposed by the speed of light, suggesting that the immense distances between stars may prevent us from ever reaching other parts of the cosmos. It also touches on the possibility that extraterrestrial intelligences might face similar constraints.

Opinions

The Sun is depicted as an unremarkable star in the cosmic landscape, despite its importance to Earth.
The size of Stephenson 2–18 is used to illustrate the diversity and grandeur of celestial objects in the universe.
The article implies that humans may never overcome the limitations of light speed, confining us to our local area in space.
It is suggested that the same limitations might apply to hypothetical intelligent extraterrestrial life, if it exists.
The author encourages readers to engage with others about these topics, potentially surprising them with detailed knowledge about the universe and life within it.

The Sun is tiny in comparison to some stars.

The Solar System is estimated to be more than 4.5 billion years old, at its centre is an average G-type main-sequence star or yellow dwarf star which we call the Sun.

Although our closest star the Sun is the main reason we are here most of us give it little thought as we live out our lives on this magical planet.

The Sun is nothing special when comparing it with other stars, there are stars that are smaller but there are also stars that have unimaginable sizes.

Stephenson 2–18 is arguably the largest star known at this time. It lies 18,900 light-years from the Earth. But remember, light travels 1,080 million kilometres per hour or 9.46 trillion kilometres in a year, yes this star is very far away by our standards.

How can we visualise the size of Stephenson 2–18 when comparing it to the Sun? This gigantic star has a diameter that is 2,150 times that of the Sun.

The Sun has a diameter of 1,392,680 kilometres, so using a simple sum the diameter of Stephenson 2–18 works out to 2,994,262,000 kilometres.

When we use large numbers it becomes difficult for us to comprehend.

Maybe the next paragraphs will help in the understanding of how big this star really is.

As you probably know 8 planets orbit the Sun they are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and the farthest away planet Neptune.

Now you will have to use your imagination!

Replace the Sun with Stephenson 2-18 so it is in the same position in the Solar System, that would be very bad news for all the planets, especially the five closest to the Sun and possibly the sixth planet Saturn, they would all be inside the giant star.

Light travels at almost 300,000 kilometres per second. To travel the circumference of the Sun would take light 15 seconds, to travel the circumference of Stephenson 2–18 would take light an incredible 8.7 hours.

Anything that has mass could ever reach the speed of light, it could be the reason we will never be able to leave our local area in space.

We have never heard from intelligent extraterrestrials, they too might be restricted to their own small area in space. That is if they really do exist.

You might like to ask your family or friends these questions and test their knowledge, the detailed answers might come as a surprise.