How far is the Earth from celestial bodies in the solar system?

The distance from the Earth to the Sun is about 149.6 million kilometers. Our current passenger spacecraft only reaches the highest speed of 40,000km / h. At this rate, it takes a long time for us to come to explore the Sun and other planets in our solar system.

1. It takes hundreds of thousands of years for light to travel from the center of the Sun to Earth?
2. How the Sun will look when viewed from other planets
3. What's interesting is what happens if the Moon is 400km from Earth?

But if we built a spacecraft with a speed of light of 1,080 million km / h, humans could explore distant planets in the solar system in a very short time.