Observable universe is 93 billion light years wide but what’s beyond it? Here’s what we can’t see…
One of the most important pieces of evidence for this limit is the cosmic microwave background radiation, faint…
Could you survive HD 189733b, the 927°C world that rains razor-sharp glass?
From afar, HD 189733b glimmers like a tranquil jewel, a sapphire-coloured world suspended in the darkness of space.…