Distance to Earth: 8.611 light years
Close. In astronomical terms.
Sirius is the brightest star (in fact, a star system) in the Earth’s night sky. With a visual apparent magnitude of -1.46, it is almost twice as bright as Canopus, the next brightest star.
The name “Sirius”is derived from the Ancient Greek (Seirios), meaning “glowing” or “scorcher”. The system has the Bayer designation Alpha Canis…
Distance to Earth: 8.611 light years
Close. In astronomical terms.
Sirius is the brightest star (in fact, a star system) in the Earth’s night sky. With a visual apparent magnitude of -1.46, it is almost twice as bright as Canopus, the next brightest star.
The name “Sirius”is derived from the Ancient Greek (Seirios), meaning “glowing” or “scorcher”. The system has the Bayer designation Alpha Canis…
Dog Star
Distance to Earth: 8.611 light years
Close. In astronomical terms.
Sirius is the brightest star (in fact, a star system) in the Earth’s night sky. With a visual apparent magnitude of -1.46, it is almost twice as bright as Canopus, the next brightest star.
The name “Sirius” is derived from the Ancient Greek (Seirios), meaning “glowing” or “scorcher”. The system has the Bayer designation Alpha Canis Majoris (a CMa).
What the naked eye perceives as a single star is actually a binary star system, consisting of a white main-sequence star of spectral type A1V, termed Sirius A, and a faint white
dwarf companion of spectral type DA2, called Sirius B. The distance separating Sirius A from its companion varies between 8.2 and 31.5 AU
The Sun
The Sun is a G-type main-sequence star comprising about 99.86% of the total mass of the Solar System. It is a near-perfect sphere, with an oblateness estimated at about 9
millionths, which means that its polar diameter differs from its equatorial diameter by only 10 kilometres (6.2 mi). Since the Sun consists of a plasma and is not solid, it rotates
faster at its equator than at its poles. This behavior is known as differential rotation and is caused by convection in the Sun and the movement of mass, due to steep temperature
gradients from the core outwards. This mass carries a portion of the Sun’s counter-clockwise angular momentum (as viewed from the ecliptic north pole), thus redistributing the angular velocity. The period of this actual rotation is approximately 25.6 days at the equator and 33.5 days at the poles.
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Our Nearest Main Sequence Star
The Sun The Sun is a G-type main-sequence star comprising about 99.86% of the total mass of the Solar System.
The Sun
The Sun is a G-type main-sequence star comprising about 99.86% of the total mass of the Solar System. It is a near-perfect sphere, with an oblateness estimated at about 9
millionths, which means that its polar diameter differs from its equatorial diameter by only 10 kilometres (6.2 mi). Since the Sun consists of a plasma and is not solid, it rotates
faster at its equator than at its poles. This behavior is known as differential rotation and is caused by convection in the Sun and the movement of mass, due to steep temperature
gradients from the core outwards. This mass carries a portion of the Sun’s counter-clockwise angular momentum (as viewed from the ecliptic north pole), thus redistributing the angular velocity. The period of this actual rotation is approximately 25.6 days at the equator and 33.5 days at the poles.
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#gallery-0-7 .gallery-item {
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margin-top: 10px;
text-align: center;
width: 33%;
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border: 2px solid #cfcfcf;
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/* see gallery_shortcode() in wp-includes/media.php */
Our Nearest Main Sequence Star
The Sun The Sun is a G-type main-sequence star comprising about 99.86% of the total mass of the Solar System.
The Sun
The Sun is a G-type main-sequence star comprising about 99.86% of the total mass of the Solar System. It is a near-perfect sphere, with an oblateness estimated at about 9
millionths, which means that its polar diameter differs from its equatorial diameter by only 10 kilometres (6.2 mi). Since the Sun consists of a plasma and is not solid, it rotates
faster at its equator than at its poles. This behavior is known as differential rotation and is caused by convection in the Sun and the movement of mass, due to steep temperature
gradients from the core outwards. This mass carries a portion of the Sun’s counter-clockwise angular momentum (as viewed from the ecliptic north pole), thus redistributing the angular velocity. The period of this actual rotation is approximately 25.6 days at the equator and 33.5 days at the poles.
A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite. That is, it is in direct orbit of the Sun, and is massive enough for its shape to be in hydrostatic equilibrium under its own gravity, but has not cleared the neighborhood around its orbit.
Pluto
A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite. That is, it is in direct orbit of the Sun, and is massive enough for its shape to be in hydrostatic equilibrium under its own gravity, but has not cleared the neighborhood around its orbit.
Pluto
A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite. That is, it is in direct orbit of the Sun, and is massive enough for its shape to be in hydrostatic equilibrium under its own gravity, but has not cleared the neighborhood around its orbit.
Proxima Centauri (Latin proxima, meaning “next to” or “nearest to”) is a red dwarf about 4.24 light-years from the Sun, inside the G-cloud, in the constellation of Centaurus. It was discovered in 1915 by Scottish astronomer Robert Innes, the Director of the Union Observatory in South Africa, and is the nearest known star to the Sun, although it is too faint to be seen with the naked eye, with an
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