Home (Merak)
Home  
 
 
Home » Astronomy » Merak


 

Merak

Astronomy MensaMercury

Merak is a city in Banten, Indonesia. Located on the northwest tip of Java, it is a port city and the site of a major petrochemical manufacturing plant.

 


MERAK (Beta Ursae Majoris). High in the sky in northern spring evenings, just climbing above the northern horizon in southern hemisphere autumn, the Big Dipper -- the "plough" in England -- is among the most recognized and recognizable of figures, ...

Merak is a white A1V main sequence star almost 60 times as luminous as the sun. The spectral type implies a mass about three times that of the sun, a diameter more than twice that of the sun, and an effective temperature of 9600 K.

Merak
Los enlaces en color anaranjado lo llevan a páginas en Inglés aún no traducidas al Español.
Haz "click" en la imagen para una vista completa
Imagen original de Ventanas al Universo ...

The last two, Merak and Dubhe, are the "pointer stars" that take us to the "North Star" (Polaris) so they are well worth knowing.

If you draw an imaginary line from Merak through Dubhe out of the cup of the dipper (see the picture above) and continue five times as far as Dubhe is from Merak, you will arrive at Polaris, the North Star.

Two stars in Ursa Major called Dubhe and Merak are popularly termed the Pointers because a line drawn through them points to the north celestial pole.

[8319] beta Ursae Majoris or Merak ("the loins") is the other star in the constellation that points to Polaris, along with [8316] alpha Ursae Minoris.

Beta Ursa Major, or Merak. This star is the bottom right star of the bowl of the Big Dipper. Its Celestial Coordinates are..11 hours, 1 Minute of R/A.. so..

9 light-years (ly) away from our Sun, Sol, in the northwestern corner of (10:11:22.1+49:27:15.2, ICRS 2000.0) of Constellation Ursa Major, the Great Bear, which also encompasses the Big Dipper or Plow (Plough) -- southwest of Merak (Beta Ursae ...

Named Stars: DUBHE (Alpha UMa) MERAK (Beta UMa) PHAD (Gamma UMa) MEGREZ (Delta UMa) ALIOTH (Epsilon UMa) MIZAR (Zeta UMa) ALCOR (80 UMa)
Once you find and identify the Big Dipper you can use it to find many other stars and constellations.

Beta Ursae Majoris is named Merak, or "loin"; gamma is Phecda: thigh, and delta is called Megrez: root (or base) of the tail. These three are similar stars, all white (A-type) stars, and all within 100 light years distance.

Alpha Ursae Majoris (possibly Alpha Majoris)
Merak (Beta Ursae Majoris)
Mizar (Zeta Ursae Majoris)
61 Ursae Majoris (Archer system)
Lalande 21185
Ursa Minor (Ursae Minoris) ...

is about five times the angle between the two stars at the end of the cup of the Big Dipper. Because they are so useful for finding the all-important North Star, these two stars are known as the Pointer Stars. They are also called Dubhe and Merak ...

Named stars: Alpha UMa (Dubhe), Beta UMa (Merak), Gamma UMa (Pháchd/Phekda), Delta UMa (Megrez), Epsilon UMa (Alioth), Zeta UMa (twin star Alkor+Mizar), Eta (Benetnasch/Alkaid).

Merak is the southern-most of the pointers, the two stars of Ursa Major which point towards the Pole Star. A line connecting it with nearby Alpha Ursae Majoris (Dubhe) extends to Polaris, the north star.

The two brightest stars in the Big Dipper (Dubhe and Merak, marked numbers 1 and 2 on the picture above) "point" to the North Star.

Alcor (Saidak, 80 UMa), Alioth (ε UMa), Alkaid (Benetnash, η UMa), Alula Australis (ξ UMa), Alula Borealis (ν UMa), Dubhe (α UMa), Megrez (Kaffa, δ UMa), Merak (β UMa), Mizar (ζ UMa), Muscida (ο UMa), ...

BIG DIPPER
The Big Dipper is a group of 7 stars (an ) contained in the Northern Hemisphere (The Great Bear). The two brightest stars in the Big Dipper (Dubhe and Merak) "point" to the North Star, .
1,000,000,000 ...

URSA MAJOR
Ursa Major (The Great Bear) is a well-known constellation in the Northern Hemisphere that contains the 7 stars of the Big Dipper. The two brightest stars in Ursa Major (Dubhe and Merak) "point" to the current North Star, Polaris.
...

See also: Ursa Major, Star, Sky, Dubhe, Earth