10 most difficult stars riddlesStars quiz
What is the name of the hypothetical last stage of the evolution of Sun-sized stars?
A black dwarf is a theoretical stellar remnant, specifically a white dwarf that has cooled sufficiently that it no longer emits significant heat or light
What is the second brightest star in the night time sky, after Sirius?
Canopus is the brightest star in the southern constellation of Carina, and the second brightest star in the night time sky, after Sirius. Its name is generally considered to originate from the mythological Canopus, who was a navigator for Menelaus, king of Sparta.
What astronomical object emerges sometimes from supernova instead of a black hole?
only a black hole can emerge from supernova
A magnetar is a type of neutron star with an extremely powerful magnetic field. The magnetic field decay powers the emission of high-energy electromagnetic radiation, particularly X-rays and gamma rays. As of March 2016, only 23 magnetars are known, with six more candidates awaiting confirmation.
What is the largest discovered star? (by radius)
VY Canis Majoris
UY Scuti is a bright red supergiant and pulsating variable star in the constellation Scutum. It is currently the largest known star by radius and is also one of the most luminous of its kind. It has an estimated radius of 1,708 solar radii (1.188×109 kilometres; 7.94 astronomical units); thus a volume nearly 5 billion times that of the Sun. It is approximately 2.9 kiloparsecs (9,500 light-years) from Earth. If placed at the center of the Solar System, its photosphere would at least engulf the orbit of Jupiter.
This unique line of about 20 stars is known as ...
It was named by in honour of Father Lucian Kemble (1922–1999), a Franciscan friar and amateur astronomer who wrote a letter to Houston about the asterism, describing it as "a beautiful cascade of faint stars tumbling from the northwest down to the open cluster NGC 1502" that he had discovered while sweeping the sky with a pair of 7×35 binoculars
What is a "blue straggler" in astronomy?
Blue straggler stars are stars in open or globular clusters that are hotter and bluer than other cluster stars having the same luminosity, they rapidly rotate at a rate of 75 times that of the Sun's rotation. Blue stragglers were first discovered by Allan Sandage in 1953 while performing photometry of the stars in the globular cluster M3.
What is the source of the most powerful release of energy in the universe, second in scale only to the Big Bang?
Gamma-ray bursts are the brightest in the universe, even brighter than the glare of quasars, second only to the brightness and power of the Big Bang. It is believed that arise during disruption of stars by black holes.
The colour of the star corresponds to its temperature. Which one is the hottest?
You can tell the temperature of a star by looking at its color. The coolest stars are red, then orange, then yellow. Even hotter stars are white and then the hottest stars are blue. The surface temperature of our sun is 5777 Kelvin.
Which of the constellations is the largest?
Hydra is the largest of the 88 modern constellations, measuring 1303 square degrees. Also one of the longest at over 100 degrees, It has a long history, having been included among the 48 constellations listed by the 2nd century astronomer Ptolemy. It is commonly represented as a water snake.
What is the name of the brightest star in the constellation Ursa Major?
Alioth is (despite being designated 'epsilon') the brightest star in the constellation of Ursa Major, and at magnitude 1.76 is the thirty-first-brightest star in the sky. Historically, the star was frequently used in celestial navigation in the maritime trade, because it is listed as one of the 57 navigational stars.