The Sun does emit light in space, but it might seem like there is no light in space because space itself is mostly empty and devoid of particles that can reflect or scatter light.
When the Sun emits light, it radiates energy in the form of electromagnetic waves across a broad spectrum, including visible light. These electromagnetic waves, or photons, travel through space in straight lines until they encounter an object or are absorbed by matter.
On Earth, our atmosphere contains particles such as gas molecules, dust, and water droplets that can scatter and reflect sunlight. This scattering and reflection cause the light to interact with the particles and disperse in different directions, illuminating the atmosphere and the Earth's surface.
In space, where the density of particles is extremely low, there are fewer opportunities for light to scatter or reflect off particles. Consequently, space appears dark to our eyes because there are very few particles to interact with the light and redirect it towards us.
However, it's important to note that space is not entirely devoid of light. There are various sources of light in space, such as stars, galaxies, and other celestial objects, which emit light and can be detected by telescopes and other instruments.