Earth, as seen from Mars, appears as a bright, moving object in the night sky. Its apparent brightness varies depending on the time of year and the relative positions of the two planets in their orbits. At closest approach, Earth can be as bright as magnitude -2.8, making it the third-brightest object in the Martian sky after the Sun and the Moon.

To the naked eye, Earth would appear as a small, white or bluish-white dot. Through a telescope, it would be possible to see some details, such as the continents and oceans. The most prominent feature would be the polar ice caps, which would appear as bright white caps at the top and bottom of the planet.

Earth's rotation would also be visible, as the planet would appear to spin on its axis over the course of a Martian day. This would be most noticeable during the Martian evening and morning, when Earth would be near the horizon and its rotation would be most pronounced.

Overall, Earth, as seen from Mars, would be a beautiful and fascinating sight, and would provide a unique perspective on our planet and our place in the solar system.