航天模型，顧名思義是仿航天器外形制作的一種可回收模型，隸屬于航空航天模型，是供運動用的一種不載人的飛行器，其動力為模型火箭發動機，即一種微型固體火箭發動機。由于航天模型多呈火箭狀，故通稱模型火箭。

The aerospace model, as the name suggests, is a recyclable model made in the shape of a spacecraft. It belongs to the aerospace model and is a non manned aircraft used for operation. Its power is the model rocket engine, which is a type of micro solid rocket engine. Due to the fact that many aerospace models are rocket shaped, they are commonly referred to as model rockets.

換句話說，模型火箭是指不利用氣動升力去克服重力，而是靠模型火箭發動機推進升空的一種航空模型；它裝有使之返回地面的以便再次飛行的回收裝置；為確保，它的結構部件必須由非金屬材料制成。 模型火箭雖小，然而它要靠模型火箭發動機推進才能在大氣中飛行。因此，設計和制做模型火箭需要多方面的知識，如空氣動力學、火箭飛行力學等。

In other words, a model rocket refers to an aviation model that does not use aerodynamic lift to overcome gravity, but instead relies on a model rocket engine to propel it into space; It is equipped with a recovery device that allows it to safely return to the ground for further flight; To ensure safety, its structural components must be made of non-metallic materials. Although the model rocket is small, it relies on the propulsion of the model rocket engine to fly in the atmosphere. Therefore, designing and manufacturing model rockets requires a variety of knowledge, such as aerodynamics, rocket flight mechanics, etc.

要研究模型火箭在空氣中飛行的穩定性和空氣對它的阻力；要分析火箭的飛行軌跡，計算它的飛行高度；有條件時，還可以對模型火箭進行風洞試驗，確定火箭外形；進行模型火箭發動機靜態性能測試試驗，測量推力和工作時間，計算總沖量。

To study the stability of model rockets flying in the air and the resistance of the air to them; To analyze the flight trajectory of a rocket and calculate its altitude; When conditions permit, wind tunnel tests can also be conducted on the model rocket to determine the optimal shape of the rocket; Conduct static performance testing tests on model rocket engines, measure thrust and operating time, and calculate total impulse.

在發達的一些高等學校里，在理工科有關的課程上，甚一些中學的物理課上，教師們經常以模型火箭作為講課的題材，并在此基礎上指導學生開展一些課題研究和模型火箭的制作。

In some higher education institutions in developed countries, teachers often use model rockets as the subject matter for lectures in courses related to science and engineering, and even in physics classes in some high schools. Based on this, they guide students in conducting research projects and making model rockets.