Biggest Star in our Universe (Part-1)

Hello

Today I brought for you knowledge things.

Now, I can tell you about the star in our universe.

The number of stars in a galaxy varies, but assuming an average of 100 billion stars per galaxy means that there are about 1,000,000,000,000,000,000,000 ( that's 1billion trillion) stars in the observable universe.

But now I can tell you some stars that you can know about the biggest star in the universe.

I arrange Small to big stars.

1) Sun:-

Introduction. Our Sun is a yellow dwarf star, a hot ball of glowing gases at the heart of our solar system. Its gravity holds the solar system together, keeping everything from the biggest planets to the smallest particles of debris in its orbit.

Ancient Greeks called the Sun Helios, and this word is still used to describe the Sun. During the reign of the Roman Empire, Helios was replaced with the Latin name Sol. Like Helios, Sol is a term that is still used to describe the Sun.

With a radius of 432,168.6 miles (695,508 kilometers), our Sun is not an especially large star – many are several times bigger – but it is still far more massive than our home planet: It would take 332,946 Earths to match the mass of the Sun. The Sun’s volume would need 1.3 million piles of earth to fill it.

2)Sirius:-

Sirius also called Alpha Canis Majoris or the Dog Star, is the brightest star in the night sky, with an apparent visual magnitude of 1.46. It is a binary star in the constellation Canis Major. The bright component of the binary is a blue-white star 25.4 times as luminous as the Sun.

This star typically turns out to be Sirius, which is in the constellation Canis Major the Greater Dog and is sometimes called the Dog Star. Sirius is now rising in the southeast in the hours after midnight and can be found in the south at dawn.

These January evenings, use Orion's Belt to star-hop to Sirius, a future south hole star. Believe it or not, the brightest star in the sky. Our sparkling night beacon, Sirius in the constellation Canis Major the Greater Dog will someday serve as a very reasonable, and certainly very noticeable, South Star.

3)Pollux:-

Pollux is a star that lies in the constellation Gemini. Along with Castor, Pollux is one of the two main guideposts for asterism, which is sometimes nicknamed "the twins." The star is a red giant that has finished fusing hydrogen in its core and is now fusing other lighter elements into heavier ones.

A relatively close 34 light-years away, Pollux is just under two times the mass of our sun, almost nine times the diameter of the sun, and about 30 times the sun's brightness in visible light. A large planet, at least 2.3 times the mass of Jupiter, was confirmed in 2006 to be orbiting Pollux.

As a highly evolved and relatively cool orange-red giant, single star, Pollux is not much like its "twin" star Castor, which is actually composed of three sets of binary stars (as many as four bluish-white, main-sequence stars with two fainter companions).

4)Arcturus:-

Today, astronomers know that Arcturus packs a lot of punch despite being only about 1.5 times the mass of the sun.

With an apparent visual magnitude of −0.05, Arcturus is the biggest star in the northern celestial hemisphere and the fourth brightest star in the night sky, after Sirius (−1.46 apparent magnitude), Canopus (−0.72), and α Centauri (combined magnitude of −0.27).

The arc of the Big Dipper handle extended outward always points to Arcturus. Notice that Arcturus is an orange-colored star. ... The atmosphere refracts or splits the stars' light to cause these stars to flash in the color of the rainbow.

5) Rigel:-

Rigel is a blue supergiant that is the brightest star in the constellation Orion (the Hunter). Due to its measured size and brightness, it is expected to end in a supernova one day. It also has two known companions, Rigel B and Rigel C.

In terms of overall size, Rigel measures 79 times the diameter of the sun. And yet, it's only 21 times more massive.

Does Rigel Have Planets?

There are around 14 planets that orbit within the Rigel star system, but more than half of them are inhabitable, especially due to all those stars' radiation.

Rigel is close to zero magnitudes in Earth's sky, making it a bright star, and is best visible in the winter northern sky. Rigel's location is:

• Right ascension: 5 hours 14 minute 32.3 seconds
• Declination: -8 degrees 12 minutes 6 seconds

Rigel has two distant stellar companions, Rigel B and Rigel C a binary system. At the ninth magnitude, the combined light of these stars would usually be enough for most telescopes to pick up, but they are too close to Rigel to be distinguished apart.

6)Aldebaran:-

Aldebaran, also called Alpha Tauri, reddish giant star in the constellation Taurus. Aldebaran is one of the 15 brightest stars, with an apparent visual magnitude of 0.85. Its diameter is 44 times that of the Sun.

This star glows with the orangish color of a K5 giant star. In visible light, it is about 153 times brighter than the sun, although its surface temperature is lower, roughly 4000 kelvins (about 3700 degrees C or 6700 degrees F) compared to 5800 kelvins (about 5500 C or 10,000 F) for the sun.

The distance between Aldebaran and us is 65.23 light-years.

Aldebaran is older and redder than the sun and preparing to fuse its lightweight core into heavier elements, which is common among stars of its type. Aldebaran has a surface temperature of about 6,760 F (3,738 C) and glows red, similar to Mars which occasionally passes by the star in the night sky.

7) Betelgeuse:-

Betelgeuse is usually the tenth-brightest star in the night sky and, after Rigel, the second-brightest in the constellation of Orion. It is a distinctly reddish semiregular variable star whose apparent magnitude, varying between +0.0 and +1.6, has the widest range displayed by any first-magnitude star.

Normally, Betelgeuse is one of the ten brightest stars in the night sky. Betelgeuse is a red supergiant a type of star that's more massive and thousands of times shorter-lived than the Sun and it is expected to end its life in a spectacular supernova explosion sometime in the next 100,000 years.

8) Eta carinae and Nebula:-

The Eta Carinae Nebula, NGC 3372, is located 7,500 lightyears away from Earth and spans a distance of over 300 lightyears. It is one of the largest star-forming regions in our Milky Way galaxy.

Eta Carinae, also called Homunculus Nebula, peculiar red star and nebula about 7,500 light-years from Earth in the southern constellation Carina and now known to be a binary star system. It is one of a small class of stars called luminous blue variables.

And their study is primarily the task of the astrophysicists at the research center. One such particle accelerator much larger than the man-made facility of the European Organization for Nuclear Research (CERN) in Geneva is the double star system Eta Carinae.

9) Antares:-

At 680 times the sun's radius, Antares is a truly enormous star. That's more than 3 astronomical units (AU). One AU is the Earth's average distance from the sun. If by some bit of magic Antares was suddenly substituted for our sun, its surface would extend well past the orbit of Mars.

Its estimated surface temperature is much cooler than our Sun, at around 3.000 degrees Celsius / 5.400 degrees Fahrenheit. Its exact mass is yet to be concluded, calculations put it between 12-18 times the mass of our Sun. Though, Antares is rapidly losing mass as a result of a strong wind.

Antares is a red supergiant star in the Milky Way galaxy, orbiting the Core at a distance of 29,350 light-years.

10) V382 Carinae:-

V382 Carinae, also known as x Carinae, is a yellow hypergiant in the constellation Carina. It is a G-type star with a mean apparent magnitude of +3.93, and a variable star of low amplitude.

Radius: 486.99 million km

Surface Temperature: 5,866 K

Age: 6.8 Myr

Right ascension: 11h 08m 35.39s

Apparent magnitude: +3.83 (3.84 - 4.02)

Radial Velocity: +6.00 km/s

11) V838 Monocerotis:-

V838 Monocerotis is a spectroscopic binary star system in the constellation Monoceros about 19,000 light-years from the Sun. The previously unremarked star was observed in early 2002 experiencing a major outburst and was possibly one of the largest known stars for a short period following the outburst.

Radius: 264.37 million km

Distance to earth: 19,900 light-years

Surface temperature: 3,270 K

Magnitude: 15.74

Age: 4 Myr

Apparent Magnitude (V): 15.74

Echos In the Dark. On March 25, IAUC 7859 included the first announcement about the discovery of a light echo around V838 Mon using the USNO Flagstaff Station 1.0-m telescope. AAVSO Council Member Arne Henden (Universities Space Research Association and U.S. Naval Observatory (USNO)) along with U. 

12) V509 Cassiopeiae:-

V509 Cassiopeiae is one of two yellow hypergiant stars found in the constellation Cassiopeia, which also contains Rho Cassiopeiae. HR 8752 is around 15,700 light-years from Earth. 

Radius: 452.2 million km (650 R☉)

Distance to earth: 4,468 light-years

Mass: 2.188 × 10^31 kg (11 M☉)

Surface temperature: 6,000 K

Distance: 4,810±430 pc

Right ascension: 23^h 00^m 05.1^s

Apparent magnitude (V):+4.6 - +6.1

Today is this much sorry for now.

But After this, the biggest star is seen in Part-2

Please Go to this link and continue=>  https://importantandbasicthings.blogspot.com/2021/08/biggest-star-in-universe-part-2.html

Think you