* Spectral Type A: A-type stars are hotter and more luminous than our Sun (a G-type star). They are also larger in diameter.
* Main Sequence: Main-sequence stars are fusing hydrogen into helium in their cores. A-type main-sequence stars are in the prime of their lives, having a larger radius than their later-stage counterparts.
* Jupiter's Size: Jupiter is the largest planet in our solar system, with a diameter of about 140,000 km.
To give you an idea of the size difference:
* A typical A-type main-sequence star: Has a diameter about 2-3 times larger than our Sun.
* Our Sun's diameter: Is about 1.4 million km (10 times larger than Jupiter).
Therefore, an A-type main-sequence star would have a diameter of roughly 2.8 to 4.2 million kilometers, significantly larger than Jupiter.
