The brightest X-ray sources in the Chandra X-ray image of the Cartwheel Galaxy are likely black holes, and appear as the white dots that lie along the rim of the X-ray image.

• 在钱德拉拍摄的车轮星系X射线照片中，最明亮的X射线源可能是黑洞，它们是沿X射线图象边缘排布的白点。