词汇表 immense 巨大的

tears apart 分裂，分开

mass （物理）质量

precipitous edge 陡峭的边际

radio antennas 无线电天线

mimics 模仿，摹拟

quick snap 快照

colossal 庞大的

acquired 获得，被收集到

assemble 组合，凑成

测验 请听报道并回答下列问题。

1. Why are black holes called black holes?

2. How big is the Milky Way’s central black hole?

3. True or false? The Event Horizon Telescope is made up of one physical telescope.

4. Which word in the text means ‘the act of holding onto something’?

答案 1. Why are black holes called black holes?

Because black holes’ immense gravity prevents light escaping from them, so they look black.

2. How big is the Milky Way’s central black hole?

It’s about four million times the mass of our sun.

3. True or false? The Event Horizon Telescope is made up of one physical telescope.

False. The Event Horizon Telescope is made up of a network of radio antennas.

4. Which word in the text means ‘the act of holding onto something’?

Grasp.

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