Supernovas and the Local Bubble Quiz

What is the frequency of supernova explosions in the Milky Way?

• Once every 10 years

• Once every 50 years

• Once every 100 years

• Once every 500 years

What is the shape and approximate size of the Local Bubble?

• Oval, about 400 light years long

• Peanut-shaped, about 300 light years long

• Spherical, about 100 light years long

• Cylindrical, about 200 light years long

What alternative explanation do some scientists propose for the X-ray glow in the sky?

• Charge exchange between solar wind and neutral gas

• Magnetic field interactions in the galaxy

• Reflection of sunlight by interstellar dust

• Cosmic microwave background radiation

What was the primary goal of the DXL X-ray detector?

• To measure the temperature of the Local Bubble

• To distinguish between charge exchange and supernova sources of X-rays

• To map the entire Milky Way galaxy

• To determine the age of the Local Bubble

What percentage of the soft X-ray background originates from within the solar system, according to the DXL findings?

• 40%

• 20%

• 80%

• 60%