there's a star named Sirius, but no planet .... sorry
Neither Sirius A nor Sirius B have any known planets.
Yes
Sirius is a star (actually, a binary star), so none, as stars do not have moons. Either or both of the stars that comprise Sirius could theoretically have planets which have moons, but if so, we don't know about them yet.
sirius (dogstar)
Sirius is found in the Heart of Canis Major, the Big Dog - just south and east of Orion.
No. There is no such thing as an "earth-like star" as Earth is a planet, not a star. Sirius A is a star that is larger and brighter than the sun.
In Sirius' bedroom, Harry found a two-way mirror that allowed him to communicate with Sirius in secret. This mirror became an important communication tool between Harry and Sirius throughout the series.
*SPOILER ALERT FOR PRISONER OF AZKABAN* Sirius didn't actually betray the Potters at all, that was Peter Pettigrew.
It was deduced mathematically in 1844 by Bessel, but Sirius B was not seen until 1862 by Alvin Clark.
Observed from Earth there are no brighter stars at the night sky. If you see something that is brighter, it will be a planet.
In Harrys third school year i mean the star?
Yes, the Sirius Boomboxes can be found at Bestbuy. It has good reviews and sells for around $120. I have a similar radio and I'm extremely satisfied with it.