The spectral lines of Sirius are blueshifted because the star is moving more or less toward us.
Sirius A is about twice as massive as our sun, but has a surface temperature of around 10000 degrees Kelvin, compared with our suns surface temperature of around 5800 Kelvin. The Earth and all of the other planets would be a lot hotter if they remained at their current orbit, though the orbits would change as the gravitational pull of Sirius A would be greater. The water on earth would boil off and it would become a barren planet that could not support life. Even Mars may be too hot to support life if Sirius A were our star.
XM and Sirius want to merge because they think the combined company will be more profitable than the companies would be operating separately
No, it's just a pattern of stars that someone once thought looked like a scorpion. If you were to move away from earth, all the constallations would look quite different.
As seen from Earth, Sirius is the brightest sky in the night sky. It is best on view during the months of winter in the northern hemisphere. It can be found by finding the constellation of Orion, and using Orion's Belt, to follow down low and to Orion's left.
A SWOT analysis of Sirius XM would identify their Strengths, Weaknesses, Opportunities in the market, and Threats to the market. The objective is to help the company plan its marketing strategy. It can also help an investor or competitor determine how strong the company is.
Its spectral lines would be one unique property.
It would change by shifting to the wavelength blue.
The location of those lines would be shifted to a longer wavelength (or lower frequency or energy) -- ie, towards the red part of the visible spectrum. In other words, a red shift.
If you think to flame test the color is the same; the important factor is sodium with his spectral lines.
Sirius A and B were never discovered. They have been in the night sky since humanoids first roamed the Earth. Even the dinosaurs would have seen Sirius. So no one, or creature can be said to have "discovered" Sirius.
A telescope, whose light output would be sent through a spectral analysis machine of some type. That analysis of the emission spectra of the star would be compared to the known spectra of the elements to find the composition of the star.
The energy levels of an atom are the distinctive property of that atom. The difference in energy levels determine the amount of light that could be emitted or absorbed. There is no same energy level difference from one atom to another, therefore spectral lines are referred to as an "atom's fingerprint". The spectral lines make atoms unique, just as fingerprints make people unique, no two humans have the same fingerprints.
In simplest terms, the shift of galactic spectral lines towards the red end of the spectrum would indicate simply that the galaxy in question is receding from the observer. This is an example of the Doppler effect, where the frequency is lowered (wavelengths become longer, and in this case energy of the photons is decreased) by the relative motion of the observer. The redshifting of galaxies in all directions became the primary evidence of an expanding universe (cosmological redshift). Because the expansion of the universe is fairly uniform in all directions, those galaxies that are most distant are receding the fastest and thus evidence the greatest amount of redshift. By contrast, if a characteristic spectral line of a galaxy or other object shifted towards the blue end of the spectrum (shorter wavelengths), it would be traveling towards the observer.
Caesium would be my guess
5,000.
Apart from the fact you would be burnt to a cinder as Sirius is 10,000 K. Gravitationally you would weigh about 60 times more than you do on Earth - which would be enough to kill you.
The artillery wagons would roll over him.