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Sirius is bigger than the Sun and sends out more light so why does it not actually look as bright as the Sun?
Wiki User
∙ 15y ago
It is true that Sirius is bigger and more luminous than the Sun, but it is also very far away compared to the Sun.
Wiki User
∙ 15y ago
Wiki User
∙ 11y agoIt does not. The Sun has a greater apparentmagnitude than any other star, simply because it is closer to us.
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Why does Rigel not look as bright as Sirius?
Because Rigel is much farther away. Rigel is 770 light-years away, and Sirius is only 8.6 light-years away.
How far is Sirius?
Sirius is actually a binary system.At a distance of 2.6 parsecs (8.6 light years), the Sirius system is one of our near neighbours.This equates to approximately:5 x 1013 miles8.1 × 1013 kilometres543,861 AU.
How far is Epsilon Eridani from Sirius?
If Epsilon Eridani actually exisits, I think the distance is 10.5 light years.
Why Some stars appear to shine more brightly than the others?
The stars vary in both how far away they are and in actual brightness. The closer a star is to us, the brighter it will appear. Stars also vary in actual brightness. For example, the brightest star in the night sky is Sirius. It appears bright because it is both a fairly bright star (about 25 times brighter than the sun) and is one of the closest stars to us at 8.6 light years away. The nearest star visible in the night sky, Alpha Centauri, is about half that distance but does not appear as bright because it is far less bright than Sirius in actual luminosity. Conversely, Sirius also appears brighter than Betelgeuse which is actually much brighter than Sirius but also much farther away.
Is sirius a star or planet?
The star Sirius is not a planet or even a single star but is in fact a binary star, or two stars that orbit each other. Together, these two stars are often called The Dog Star, as they are the brightest object in the constellation Canis Major - or The Big Dog. The stars, named Sirius A and Sirius B, orbit each other about 20 Astronomical Units (the distance from the Sun to the planet Uranus) that takes about 50 years to complete on orbit. Right now, they appear to be moving away from each other and will reach their maximum separation on the year 2019. At a distance of roughly 8.6 light years, the Sirius binary star system is actually relatively close to us. Sirius A (the larger of the two binary stars) is also extraordinarily bright, about 25 time brighter than our sun. These two factors make Sirius one of the top ten brightest stars in our night sky. While Sirius A is very large and bright, Sirius B (the smaller of the two binary stars) is significantly smaller than it's companion - about the size of our Earth. But even at it's small size, Sirius B still has nearly the same mass as our Sun. That much mass in such a tiny space means more surface gravity (about twice that of Sirius A) and more heat (about 2.5 times that of Sirius A). Just because it's small, doesn't mean it's not awesome. Sirius is considered a wintertime star, usually only seen between the months of December and March. It is part of the Winter Triangle asterism along with Betelgeuse and Procyon. So if you're in the Northern Hemisphere and the weather begins to turn cold, take a look into the southern night sky and find Sirius, The Dog Star!
Is Sirius the largest star?
No. Sirius is the brightest star in Earth's night sky, but how bright a star appears is a product of its actual brightness and its distance from us. Sirius itself is actually two stars with Sirius A emitting the vast majority of the system's light. Sirius A is a fairly large star, but others are much larger.
Why does Rigel not look as bright as Sirius?
Because Rigel is much farther away. Rigel is 770 light-years away, and Sirius is only 8.6 light-years away.
How is the star Polaris compared to that of the star Sirius?
Sirius is the brightest star...Polaris is bigger then Sirius, Polaris is 360 to 820 light years away from earth, and Sirius is only 8.6 light years away. The Sirius star is known as the dog constalation, The polaris star is found at the tip and corner of the big dipper and the little dipper
How much light doe the sun provide than sirius?
Sirius is about 25 times as bright as our Sun. That refers to the absolute magnitude; of course, our Sun looks much brighter to us, because it is closer.
How far is Sirius?
Sirius is actually a binary system.At a distance of 2.6 parsecs (8.6 light years), the Sirius system is one of our near neighbours.This equates to approximately:5 x 1013 miles8.1 × 1013 kilometres543,861 AU.
How does Sirius receive it's light?
Sirius does not receive or reflect light, it transmits or radiates light. Sirius is a Star and thus similar to our Sun and thus converts Hydrogen into light by nuclear fusion.
How far is Epsilon Eridani from Sirius?
If Epsilon Eridani actually exisits, I think the distance is 10.5 light years.
Why Some stars appear to shine more brightly than the others?
The stars vary in both how far away they are and in actual brightness. The closer a star is to us, the brighter it will appear. Stars also vary in actual brightness. For example, the brightest star in the night sky is Sirius. It appears bright because it is both a fairly bright star (about 25 times brighter than the sun) and is one of the closest stars to us at 8.6 light years away. The nearest star visible in the night sky, Alpha Centauri, is about half that distance but does not appear as bright because it is far less bright than Sirius in actual luminosity. Conversely, Sirius also appears brighter than Betelgeuse which is actually much brighter than Sirius but also much farther away.
Why are some stars so large and bright but dont look as bright to us?
Stars are positioned at very different distances from us. So a bright star like Sirius is actually quite close and not a lot bigger than the Sun. But Betelgeuse is many times further away but much bigger, so those two stars are both quite close in apparent brightness. The brightest of the 50,000 stars in the 'Sky Catalgue 2000' is Rho Cassiopiae, which is about 14 magnitudes brighter than the Sun, that is about 400,000 times brighter, and about 21,000 light-years away, but it just looks like an ordinary dim star of magnitude 4½.
How old is the star sirius?
From Wikipedia: "The age of the system [Sirius is a double star] is estimated at around 230 million years." So, a fairly young star, at least if compared to typical stars, including our own Sun.
What happens to your pupil when you go from a dark room into bright light?
They become bigger and widder
What is a rhyming word pair for a 100-watt bulb?
bright light bright light
