Group 1 - The article discusses the distinction between aviation, aerospace, and astronautics, with the "Kármán line" serving as a boundary between the atmosphere and outer space [5][7][8] - The Earth's atmosphere is divided into five layers, with commercial flights operating within the troposphere and stratosphere, while the Kármán line is located at an altitude of 100 kilometers [5][7] - The Chinese space station orbits the Earth approximately every 90 minutes, allowing astronauts to witness 16 sunrises and sunsets in a single day [9] Group 2 - The article highlights the challenges of launching rockets in cold temperatures, referencing the successful launch of the "Shenzhou 4" spacecraft in 2002, which required the use of blankets for insulation [11] - It mentions the development of technologies from space applications that have been adapted for civilian use, such as high-absorbency materials that led to the creation of diapers [12] - The article explains how astronauts can temporarily grow taller in a weightless environment due to the expansion of spinal discs, resulting in a height increase of 2-5 centimeters [14]