1. What objects constitute a Hickson Compact Group?
Galaxies
2. What is 51 Pegasi b?
The first exoplanet to be discovered. Exoplanets are planets that orbit a star other than the Sun
3. Where is the Headquarters of the International Astronomical Union?
Paris
4. Who discovered the planet Pluto?
Clyde Tombaugh
5. What new category of astronomical objects did the International Astronomical Union create in 2008 following the redefinition of the word planet in 2006?
Plutoid
6. What is the name given to celestial objects between Jupiter and Neptune that act like both asteroids and comets?
Centaurs
7. What astronomical term describes the centre of mass of two bodies that orbit around each other, for example the earth and the moon?
Barycentre
8. What are the 3 satellites of Pluto?
Charon, Nix and Hydra
9. On 21st October 2003, an object bigger than Pluto was discovered and it eventually led to Pluto being stripped of its planetary status. Initially named 2003 UB313, by what name do we know it today?
Eris
10. Name the 19th Century astronomer who posed one of the most interesting problems of astrophysics – ‘why is the sky dark at night?’
Heinrich Olbers (Olbers Paradox)
Galaxies
2. What is 51 Pegasi b?
The first exoplanet to be discovered. Exoplanets are planets that orbit a star other than the Sun
3. Where is the Headquarters of the International Astronomical Union?
Paris
4. Who discovered the planet Pluto?
Clyde Tombaugh
5. What new category of astronomical objects did the International Astronomical Union create in 2008 following the redefinition of the word planet in 2006?
Plutoid
6. What is the name given to celestial objects between Jupiter and Neptune that act like both asteroids and comets?
Centaurs
7. What astronomical term describes the centre of mass of two bodies that orbit around each other, for example the earth and the moon?
Barycentre
8. What are the 3 satellites of Pluto?
Charon, Nix and Hydra
9. On 21st October 2003, an object bigger than Pluto was discovered and it eventually led to Pluto being stripped of its planetary status. Initially named 2003 UB313, by what name do we know it today?
Eris
10. Name the 19th Century astronomer who posed one of the most interesting problems of astrophysics – ‘why is the sky dark at night?’
Heinrich Olbers (Olbers Paradox)
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