What is the connection between the star Sirius and the planet Earth?

Answer 1

It is the brightest star in the earth's night time sky.

Answer 2

Interesting question! Well, there are 2 stars called Sirius. There is Sirius A, the brighter one, and Sirius B, which is hard to see even with proper equipment. They are very close to each other(or so it seems from Earth), and still people knew about them in the ancient times. Some say that there is a planet near Sirius B and the ancient gods came from that planet, but I'm not very sure about that.

Answer 3

Sirius (α CMa / α Canis Majoris / Alpha Canis Major) is the brightest star in the night-time sky, with a visual apparent magnitude of −1.47. This binary star system consists of a white main sequence dwarf star and a faint white dwarf companion. It is located in the constellation Canis Major.

Sirius can be seen from almost every inhabited region of the Earth's surface (those living north of 73.284 degrees cannot see it) and, in the Northern Hemisphere, is known as a vertex of the Winter Triangle. The best time of year to view it is around January 1, when it reaches the meridian at midnight.

Under the right conditions, Sirius can be observed in daylight with the naked eye. Ideally the sky must be very clear, with the observer at a high altitude, the star passing overhead, and the sun low down on the horizon.

At a distance of 2.6 pc or 8.6 light years, Sirius is one of the nearest stars to Earth. Its closest large neighbour star except Sirius B is Procyon, 1.61 pc or 5.24 ly away.

Sirius is a main sequence star of spectral type A0 or A1 and has a mass about 2.1 times that of the Sun. It has a companion star that has already evolved off the main sequence into a white dwarf, and hence was once the more massive of the two. These two stars orbit each other with a separation of about 20 AU(roughly the distance between the Sun and Uranus) and a period of close to 50 years. The orbit of Sirius B can take the star in front of Sirius A, briefly lowering the total luminosity. For this reason the system is considered an eclipsing binary variable star.

A typical white dwarf has a mass equal to 0.5–0.6 solar masses. With a mass nearly equal to the Sun's, Sirius B is one of the more massive white dwarfs known. Yet that same mass is packed into a volume roughly equal to the Earth. White dwarfs form only after the star has evolved from the main sequence and then pass through a red giant stage. This occurred when Sirius B was less than half its current age, approximately 120 million years ago. The original star had an estimated 5 solar masses and was probably a spectral type B7 V star when it still was on the main sequence.

While it passed through the red giant stage, Sirius B may have enriched the metallicity of its companion. For this reason Sirius A now has a higher than normal abundance of elements heavier than helium, such as iron.The Sirius star system also emits a higher than expected level of infrared radiation, as measured by IRAS. This may be an indication of dust in the system, and is considered somewhat unusual for a binary star.

The current primary, Sirius A, is expected to have completely exhausted the store of hydrogen at its core within a billion (109) years. At that point it will pass through its own red giant stage, then settle down to become a white dwarf.

Hope that was informative ... cheers!!!

Answer 4

Sirius is the brightest star (other than the Sun) which can be seen from Earth in spite of the fact that Sirius is not the closest star.

Answer 5

Well, if you believe in this type of thing:

"The Dogon are a people of about 100,000 who dwell in western Africa. According to Robert Temple (The Sirius Mystery), the Dogon had contact with some ugly, amphibious* extraterrestrials, the Nommos, some 5,000 years ago. The aliens came here for some unknown reason from a planet orbiting Sirius some 8.6 light years from earth. The alleged visitors from outer space seem to have done little else than give the earthlings some useless astronomical information. "

Answer 6

Um, they're both in the Milky Way galaxy.

Sirius is the BRIGHTEST star in our sky, but not the closest (that honor goes to Proxima Centauri, which is only 4.2 light-years away). Sirius, a double star, is more than twice that distance, and is the ninth-closest to our sun.

For more info, check out the Wikipedia article.

Answer 7

Sirius is one of the closest stars to Earth.

Answer 8

R U Sirius?

(I couldn't resist.)

Answer 9

It is the only star i'm aware of that you can see in day.

Answer 10

closest star from earth after sun.(i am not surre though!) plz check relative website