None. If it had an "atmosphere" like the Sun, it would have to be a star, itself, like the Sun is, not a planet.
The sun does not have an atmosphere - it is a star, not a planet. It is a ball of burning gas.
Mercury, the known planet that orbits closest to the sun, has no atmosphere.
Mercury has no real atmosphere as the planet is too close to the sun and is not massive enough.
Mercury
Mercury is the closest planet to the Sun and has a very small atmosphere.
Mercury is.
mass of the planet and the distance from the sun
Mercury - the closest planet to the sun. Solar wind and radiation from the sun also blast off some of Mercury's minuscule atmosphere (Mercury's atmosphere is sometimes referred to as an exosphere)
Mercury - the closest planet to the sun. Solar wind and radiation from the sun also blast off some of Mercury's minuscule atmosphere (Mercury's atmosphere is sometimes referred to as an exosphere)
Mercury - the closest planet to the sun. Solar wind and radiation from the sun also blast off some of Mercury's minuscule atmosphere (Mercury's atmosphere is sometimes referred to as an exosphere)
The amount of light and warmth a planet receives from the sun depends on its distance from the sun, its tilt or axial tilt, and its atmosphere. These factors determine how much solar radiation is absorbed and reflected by the planet, influencing its overall temperature and climate.