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Section 5.3.3: How do we see the energetic Universe?.Section 5.3.2: What is the future of radio astronomy?.

Section 5.3.1: How do we hear and see the invisible Universe?.Section 5.3: How do we see the invisible?.Section 5.2.2: What is the future for space-based telescopes?.Section 5.2.1: What are the biggest ground-based telescopes?.Section 5.2: How do telescopes work in the visible and near-visible?.Section 5.1.3: What are examples of EM radiation?.Section 5.1.2: Is light a wave or a particle?.Section 5.1.1: What do the colours in a rainbow tell us?.Section 5.1: What is the electromagnetic spectrum?.Section 4.2: How will the Universe end?.Section 4.1: How did the Universe begin?.Section 3.3.2: Will the Milky Way ever be involved in a collision?.Section 3.3.1: Why do galaxies collide?.Section 3.3: What would happen if galaxies collide?.Section 3.2: How do stars and gas move in galaxies?.Section 3.1.3: What shape is the Milky Way?.Section 3.1.2: Do all galaxies look the same?.Section 3.1.1: How did astronomers figure out what galaxies were?.Section 2.3: Do other stars have planets?.Section 2.2: How are stars born and how do they die?.Section 2.1: What stars can I see from my house?.Section 1.4: If an object from space hit us, would it really be Armageddon?.Section 1.3.3: What's the surface of Titan like?.Section 1.2: The Moon and its influence.