"There's always something new and intriguing to learn about space, making it a fascinating subject for both scientists and laypeople.

A startling fact about the cosmos is the sheer size of it. No person can truly grasp the immense scale of space, which is so vast it is measured in light years - a distance that light travels in a year, which is roughly 5.88 trillion miles. This fact alone highlights the astounding scale of the universe.

Another intriguing fact about space involves Venus, our neighbouring planet. Venus is often called our 'sister planet' due to its similar size and mass to Earth. Despite this, the conditions on Venus are far from Earth-like. With a harsh and hostile environment, Venus is the hottest planet in our solar system, even though it’s not the one closest to the Sun. This is due to its dense atmosphere, which traps in heat creating a greenhouse effect.

Moving to the smaller scales, we encounter neutron stars which are another source of fascinating space facts. Neutron stars are the densest and smallest stars known to exist, yet they have unbelievable physical properties. For instance, a sugar-cube sized amount of neutron star material would weigh as much as a mountain on Earth – it's an astonishing comparison that serves to underscore the truly formidable nature of these celestial bodies.

Indeed, space is not a perfect vacuum. There are sparse particles scattered in space, along with cosmic rays, neutrinos, and even the elusive dark matter. These here elements interact in fascinating ways, giving rise to dazzling phenomena like auroras, and they provide clues about the nature of the universe as well as its origins.

Lastly, did you know that the silence of space isn't due to the lack of sound, but rather because sound waves need a medium, like air or water, through which to travel? In the vacuum of space, there's no medium for sound to pass through which is why it's so eerily silent.

To wrap it all up, space provides us with some truly astonishing facts, from the extent of its size to the singular behaviours of its celestial bodies. With each new discovery, we are brought a step closer to understanding our place in the cosmos – but we still have far to go. The universe, in its vast and inexplicable reality, remains a challenging and captivating mystery."