How Big Is Vy Canis Majoris?
What is the name of VY Canis Majoris?
I know this seems like a silly question but I have learned that Sirius, a star in the constellation Canis Majoris, is often reffered to as alpha Canis Majoris, so I was wondering if VY Canis Majoris has another name, a name along the lines of Sirius, or if it is simply VY?
Nope...VY Canis Majoris IS its name.
Only the stars that are substantially interesting to the unaided eye (and possibly documented since ancient times) in our sky get cool 1-word names like Sirius, Betelgeuse, Rigel, Arcturus, Canopus, Tolliman, Polaris, etcetera.
Any star that isn't particularly interesting in its naked eye observation doesn't get a simple name...instead gets a few needed names in order to help people find it by the constellations and the other stars of the same constellation.
VY Canis Majoris...even while it is literally the (geometrically) biggest star known, it isn't very close to the solar system, and we cannot see it with the unaided eye at all.
VY Canis Majoris is almost 5000 light years away.
if the biggest known star is VY Canis Majoris.. how come we dont orbit around that?
what stops us from just being pulled in by it? and where is it?
VY Canis Majoris is 4,900 light years (28,804,000,000,000,000 miles) away from Earth. We don't orbit VY Canis Majoris because we are on a stable orbit around our Sun. Our Sun doesn't orbit VY Canis Majoris because our Sun is on a stable orbit around the center of the milky way galaxy.
VY Canis Majoris gravitational pull on Earth is so small it's not even worth calculating.
Rotation And Revolvation Of Vy Canis Majoris?
The rotation period of VY Canis Majoris is not well known. Rotation speeds have been measured, but the results have distinct wide peaks at 15 and 60 km/sec. This is so because the star is shrouded by the gas and dust it is losing at a high rate. Assuming the usually quoted radius of about 2000 R_Sun these numbers give rotation periods of 4 to 10 years.
Not sure what you mean by "revolution": VY Canis Majoris is a single star, not part of a binary.
Finally VY Canis Majoris is categorized as a semiregular variable and has an estimated period of 2000 days.
VY Canis Majoris is the largest star that we know of so far?
There is nothing more frustrating than posting a question and people don't or can't answer it but they still want the 2 points so they say anything. 10 points are better Please... What is the diameter of this star? How many of our Suns could fit into it? How many of our Earths could fit into it? The international space station circles Earth at about 16,000 MPH and takes about 90 mins to circle the Earth once. Now if it were possible, at this same speed, how long would it take the ISS to circle VY Canis Majoris once?
1) VY Canis Majoris diameter is approximately 1,729,897,400 (1.7 billion) miles.
2) Approximately 8,000,000,000 (8 billion) of our Sun's can fit inside VY Canis Majoris.
3) Approximately 10,395,630,100,000,000 (10.3 quadrillion) Earth's can fit inside VY Canis Majoris.
4) It would take the ISS 7.6 years (2,799 days) to circle VY Canis Majoris once.
Was there a star discovered that is bigger than VY Canis?
I'm guessing you mean VY Canis Majoris. If so, the answer is yes; there are a few known stars that are larger than VY Canis Majoris. This is mainly because earlier estimates of the size of VY Canis Majoris were inaccurate, and we've since learned that it's not as large as was originally thought.
The article below lists the largest known stars. The largest currently known is called NML Cygni, though note that there is some uncertainty in several of the measurements; the upper bound on the size of KY Cygni is larger.