That's a great question! It's important to understand that the effects of quantum entanglement are usually very tiny and only happen at a very, very small scale. While it's true that quantum entanglement allows for instantaneous communication between the entangled particles, it doesn't mean that just by looking at something, we can change or alter it.
When we use telescopes like the Hubble to observe objects in space, we are using light to see them. Light is made up of tiny particles called photons. Photons are not entangled with the objects they bounce off or interact with. They are just carrying information about those objects to our telescopes.
So when we observe something with a telescope, we are just gathering information about it. We're not directly interacting with it in a way that would cause any changes through quantum entanglement. The entanglement happens at a much smaller scale, involving individual particles like electrons or photons themselves.
It's also worth mentioning that quantum entanglement is a delicate phenomenon and is easily disrupted by interactions with the surrounding environment. So the effects of entanglement tend to be confined to the particles that are directly entangled, and they don't easily spread out to affect other things at larger distances.
In summary, while quantum entanglement is a fascinating aspect of the quantum world, it doesn't mean that just by observing or looking at something, we can alter it or cause any dangerous effects, especially on objects billions of light years away.