The Sun is The Power of The Solar System! Without The Sun we on Earth wouldn't even be alive! The Energy from The Sun is what makes life on Earth possible. No Sun, no life. Now there are many stars in The Universe that come in a wide variety different from The Sun, but there are also stars like our sun. They are called Sun-Like Stars.
Sun-like Stars are also known as Solar analog or Solar-type Stars. Solar-Type Stars are a Main-Sequence star that have Yellow color. On the B-V Color Index it has a range of .48 and .80. The Sun is a .68 on the B-V Color Index. Examples of Solar-Type Stars are The Sun, Alpha Centaurus A, Delta Pavonis, Tau Ceti & 72 Herculis.
Solar Analogs are like The Sun photometrically. This means that light and luminosity of The Sun and Solar Analog Stars are similar. Solar Analog Stars are a temperature of 5278 Kelvin to 6278 Kelvin or 5005 degrees Celsius to 6005 degrees Celsius or 9041 degrees Fahrenheit to 10839 degrees Fahrenheit. This is within 500 Kelvin (227 degrees Celsius or 440 degrees Fahrenheit) from the temperature of The Sun. Example of Solar Analog Stars are The Sun, Sigma Draconis, 51 Pegasi, 61 Virginis, 47 Ursae Majoris, 20 Leonis Minoris, Alpha Mensae and Psi Serpentis.
A Solar Twin is a Star that is almost identical to The Sun hence the word twin. A Clone of The Sun hypothetically would be a G2V Star with a surface temperature of 5,778 Kelvin or 5505 degrees Celsius or 9941 degrees Fahrenheit. A Clone Star to The Sun would also have to be 4.603 Billion Years old (The Age of The Sun). To this date there hath not been a Clones of The Sun discovered. This does not mean it isn't out there in Space, but we have not observe one yet. Now a Star does not need to be a Clone of The Sun to be considered a Solar Twin, twins in the human species don't have the exact everything. To be considered a Solar Twin thou must be 50 Kelvin from The Sun (-223.15 degrees Celsius or -369.67 degrees Fahrenheit). The temperature range then is 5728 Kelvin to 6728 Kelvin (5455 to 6455 degrees Celsius or 9851 to 11651 degrees Fahrenheit). The Age of a Solar Twin is also 1 Billion years from the age of The Sun, older or younger. This means The Stars age must be between 3.6 giga-annum to 5.6 giga-annum. A giga-annum is a term used to describe a Billion Years, so 1 Billion equals 1 giga-annum; abbreviated Ga. Another term for a Solar Twin is a HabStar; Habitable Star. These stars, being so similar to The Sun, have the potential to house planets in its orbit that can support life like Earth does. To be considered a HabStar a star must be a Main Sequence Star, have the capability of maintain terrestrial planet in it orbit, have a age of at least 3 giga-annums, does not have a Stellar Companion Star, Support a stable habitable zone, and be not vary on its state of being. One Star that matches this criteria is HIP 11915 which is 185.53 Light Years from Earth. Examples of Solar Twins are The Sun, 18 Scorpii, Kepler-452, HD 150248 & HD 101364.
There is a lot of different astronomical objects in The Universe. There is even a multitude of different types of Stars. However, there are stars there are like our Sun. These Sun-Like Stars are all over the cosmos and they behave and look like The Sun, some may even have a planet orbiting it that contains life! We too, vary like the stars in the night sky and this might make us feel isolated and alone. Even if there are clones of us, like The Sun not having clones, this does not mean that we are alone in The World. There are hundred if not thousands or millions of people who have the same interest, look similar and act just like us. People with similar lifestyles and similar experience that we can find community and fellowship in. Finding these people is a key component of living a healthy life. When we find people who hold our same values, interest and experiences, we feel better about ourselves and key feature of human survival is found. Remember, no man is an island.
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'Astronomy' page explores aspects of Astronomy, Philosophy, Spacelore and other topics about The Universe!