Antares' size/Sun's size = (5840/3340)2 Ã Sqrt[9120] = 3.057 Ã 95.5 = 292. Antares is almost 300 times the size of the Sun! If the Sun were replaced by Antares, the inner planets Mercury, Venus, and Earth would be inside Antares! It is a red giant star---a star close to death.
The Modified Medical Research Council Dyspnea Scale, or MMRC, uses a simple grading system to assess a patient's level of dyspnea -- shortness of breath. This scale doesn't define the sensation of breathlessness per se, but rather the degree of disability that such breathlessness poses on day-to-day activities.
The millimeter (mm) is a unit of length in the metric system and is equal to one thousandth of a meter. It is also equal to 0.1 centimeter, 1,000 micrometres and 1,000,000 nanometres. Similar to mm, the centimeter is also a unit of length in the metric system and is equal to one hundredth of a meter. 1 centimeter is equal to 10 millimeter, 10,000 micrometers and 10,000,000 nanometers. Image Courtesy: future-edge.com.