Multiple choice general knowledge science & technology

What is special about Sirius, the Dog Star?

  1. It is the only star first observed by Albert Einstein

  2. It is the brightest star in the night sky ?

  3. It always lies directly above the North Pole ?

  4. It emits staccato barking sounds which radio telescopes can detect
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sirius (Alpha Canis Majoris) is the brightest star in the night sky with an apparent magnitude of -1.46. It's not the only star Einstein observed ( astronomers observe many stars), it doesn't stay above the North Pole (that's Polaris), and the 'barking sounds' option is humorous fiction.

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