Which is the star nearest to our solar system?

Question

Which is the star nearest to our solar system?

Answer 1

Alpha Centurie

Answer 2

its actually de sun.........cuz sun is also a star........

Answer 3

Alpha Centauri

Answer 4

Alpha Centauri is the Sun Syatem nearest to the Solar system and Proxima Centauri is the nearest star to the Solar sytem .

Proxima Centauri  belongs to Alpha Centauri System

Answer 5

Proxima Centauri.

Answer 6

Proxima Centauri

Answer 7

The nearest star to our solar system is our SUN and Proxima Centauri is the nearest star to sun nearly 4.2 light years away.

Answer 8

Proxima Centauri is the nearest known one. It is a faint red dwarf in the Alpha Centauri system, in the neighborhood of 4.2 light-years away.

This does not mean that, perhaps, a very faint "star" closer has not been discovered. I don't find it likely, but it has been proposed (not much by credible sources, but not comepletely ruled out) that our sun is a binary star, with perhaps a very faint brown dwarf orbiting near the heliopause. This could be part of the explaination for the perturbations in the orbits of Neptune and Uranus, but seeing how these are "new" discoveries (Neptune hasn't even completed one full orbit since it's discovery) and the Kuiper Belt objects could be incredibly numerous, their orbits are not as predictable as we think they are, just because of such a lack of information.

Anyway, back to Proxima... if some estimates of current observations are correct, it's lablel as the star in closest proximity to us will only be true for about another 32,000-35,000 years, when Ross 248's (aka HH Andromedae, another red dwarf star, currently over 10 light years away) motion from the perspective of our solar system will bring it closer to us than Proxima.

I also find it interesting, that our spacecraft Voyager 2 (alive and still transmitting, believe it or not) is on a course to bring it within 2 light years from HH Andromadae

Answer 9

I was going to answer but EzEkIeL has said it all! Lol.

Answer 10

It's the sun... right?

Answer 11

My friend Sunis the closest star to our solar system

Answer 12

I just want to applaud EzEkleL (notwithstanding the 4 thumsdown).

Answer 13

Proxima Centauri (Latin proximus, proxima, proximum: meaning 'next to' or 'nearest to') is a red dwarf star approximately 4.2 light-years distant in the constellation of Centaurus. It was discovered in 1915 by Robert Innes, the Director of the Union Observatory in South Africa. The star may be part of the Alpha Centauri system, and it is the nearest star to the Sun.

Because of the proximity of this star, its angular diameter can be measured directly, yielding a diameter one-seventh that of the Sun. Proxima Centauri's mass is about an eighth of the Sun's, and its average density is about 40 times that of the Sun. Although it has a very low average luminosity, Proxima Centauri is a flare star that undergoes random increases in brightness because of magnetic activity.The star's magnetic field is created by convection throughout the stellar body, and the resulting flare activity generates a total X-ray emission similar to that produced by the Sun. The mixing of the fuel at Proxima Centauri's core through convection and the star's relatively low energy production rate means that it will be a main-sequence star for another four trillion years, or nearly 300 times the current age of the universe.

Searches for companions orbiting Proxima Centauri have been unsuccessful, although these attempts could only rule out the presence of large companions such as brown dwarfs and supermassive planets. The detection of smaller objects will require the use of new instruments, such as the proposed Space Interferometry Mission. Since Proxima Centauri is a red dwarf and a flare star, whether a planet orbiting this star could support life is disputed. Because of the star's proximity, it has been proposed as a destination for interstellar travel.

Based on the parallax of 772.3 ± 2.4 milliarcseconds measured by Hipparcos (and the more precise parallax determined using the Fine Guidance Sensors on the Hubble Space Telescope of 768.7 ± 0.3 milliarcseconds), Proxima Centauri is roughly 4.2 light years from Earth, or 270,000 times more distant than the Sun. From Earth's vantage point, Proxima is separated by 2.18° from Alpha Centauri, or four times the angular diameter of the full Moon.[41] Proxima also has a relatively large proper motion—moving 3.85 arcseconds per year across the sky. It has a radial velocity toward the Sun of 21.7 km/s.

Among the known stars, Proxima Centauri has been the closest star to the Sun for about 32,000 years and will be so for about another 33,000 years, after which the closest star to the Sun will be Ross 248.Proxima will make its closest approach to the Sun, coming within 3.11 light years of the latter, in approximately 26,700 years. Proxima Centauri is orbiting through the Milky Way at a distance from the galactic core that varies from 8.3 to 9.5 kpc, and with an orbital eccentricity of 0.07.

From the time of the discovery of Proxima, it was suspected to be a true companion of the Alpha Centauri binary star system. At a distance to Alpha Centauri of just 0.21 ly (15,000 ± 700 astronomical units [AU]),[45] Proxima Centauri may be in orbit about Alpha Centauri, with an orbital period of the order of 500,000 years or more. For this reason, Proxima is sometimes referred to as Alpha Centauri C. Modern estimates, taking into account the small separation between and relative velocity of the stars, suggest that the chance of the observed alignment being a coincidence is roughly one in a million.[46] Data from the Hipparcos satellite, combined with ground-based observations, is consistent with the hypothesis that the three stars are truly a bound system. If so, Proxima would currently be near apastron, the farthest point in its orbit from the Alpha Centauri system. More accurate measurement of the radial velocity is needed to confirm this hypothesis.

If Proxima was bound to the Alpha Centauri system during its formation, the stars are likely to share the same elemental composition. The gravitational influence of Proxima may also have stirred up the Alpha Centauri protoplanetary disks. This would have increased the delivery of volatiles such as water to the dry inner regions. Any terrestrial planets in the system may have been enriched by this material.

Six single stars, two binary star systems, and a triple star share a common motion through space with Proxima Centauri and the Alpha Centauri system. The space velocities of these stars are all within 10 km/s of Alpha Centauri's peculiar motion. Thus, they may form a moving group of stars, which would indicate a common point of origin such as in a star cluster. If it is determined that Proxima Centauri is not gravitationally bound to Alpha Centauri, then such a moving group would help explain their relatively close proximity

Answer 14

The closest star is called Proxima Centauri. It's a red dwarf, so it almost invisible. You won't be able to see it without a telescope. It is orbiting around Alpha Centauri, but is at present closer.