space
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space
The physical space outside the Earth's atmosphere, where stars, planets, and other celestial bodies are found. Synonyms are 'das All' (space) or 'das Weltall' (the universe).
Die Astronauten reisten für eine Woche in den Weltraum.
The astronauts traveled into space for a week.
The word is made up of 'Welt' (world) and 'Raum' (space). So it literally describes the space that surrounds the world or the space between worlds (planets).
Die Erforschung des Weltraums ist sehr teuer.
The exploration of space is very expensive.
Pay attention to the case with the preposition 'in': movement is expressed with the accusative ('in den Weltraum' = into space), while a state or position uses the dative ('im Weltraum' = in space).
Die Rakete fliegt in den Weltraum.
The rocket is flying into space.
'Weltraum' (space) is often combined with verbs of movement and research. Typical phrases are 'in den Weltraum fliegen' (to fly into space), 'den Weltraum erforschen' (to explore space), or 'eine Mission im Weltraum durchführen' (to carry out a mission in space).
Viele Länder wollen den Weltraum friedlich erforschen.
Many countries want to explore space peacefully.
room / space
'der Raum' and 'der Weltraum' can both have to do with expanse and space. However, 'Raum' is much more general: it can refer to room, an area, or even physical space. 'Weltraum' means only the space outside Earth, where planets, stars, and other celestial bodies are. Learners may confuse the words because 'Raum' can also be meant in a very broad or physical sense in some contexts. When the topic is astronomy, rockets, or planets, 'Weltraum' is the precise word.
Im Sommer beobachten wir im Garten Sterne und sprechen über den Weltraum.
In the summer, we watch stars in the garden and talk about space.
Zwischen den Regalen bleibt kaum Raum für einen Kinderwagen.
There is hardly enough space between the shelves for a stroller.