| Question |
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| Answer |
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| Scientists have calculated the temperature of deep space with this device. |
Ground-based microwave radio telescope |
| The lightest element. |
Hydrogen |
| The second-lightest element. |
Helium |
| The third-lightest element. |
Lithium |
| Clouds of gas/dust in space that reflect and absorb light from stars. |
Nebulae |
| Collection of small grains of matter; can coalesce into large bodies such as planets, moons and asteroids. |
Planetesimal |
| All matter and energy originated from this immensely small, hot and dense particle. |
Singularity |
| An exploding star. |
Supernova |
| The oldest solid material found on Earth so far. |
Zircon crystal |