There is no permanent base on the moon primarily due to the high cost and technical challenges associated with establishing and maintaining such a base. The harsh lunar environment, including extreme temperatures, radiation, and micrometeoroid impacts, presents significant engineering and logistical hurdles. Additionally, the lack of a compelling economic or scientific rationale for a permanent moon base has limited the investment and political will needed to make it a reality. While there have been discussions and plans for lunar bases, the practical and financial obstacles have so far prevented their establishment. **

'Zum' is a preposition in German that means 'to' or 'until', while 'bis zum' means 'until'. The main difference between the two is that 'zum' is used to indicate a destination or endpoint, while 'bis zum' is used to specify a point in time or a deadline. For example, 'Ich gehe zum Supermarkt' means 'I am going to the supermarket', while 'Ich arbeite bis zum Abend' means 'I am working until the evening'. **

"Bis zum Fristen" is a German phrase that translates to "until the deadline" in English. It is used to indicate the specific time or date by which something needs to be completed or submitted. This phrase is commonly used in academic or work settings to emphasize the importance of meeting a deadline. **

"Bis zum 30." is a German phrase that translates to "until the 30th." It indicates a deadline or a specific date by which something should be completed or achieved. For example, if a document is due "bis zum 30. April," it means the document should be submitted by April 30th. **

"Bis zum" is a German prepositional phrase that translates to "until" or "up to" in English. It is used to indicate a specific point in time or a limit in space. For example, "bis zum Ende" means "until the end" and "bis zum Bahnhof" means "up to the train station." **

"Stur bis in den Tod" is a German phrase that translates to "stubborn until death" in English. It conveys the idea of being determined and persistent in pursuing a goal or belief, even in the face of great adversity or opposition. This phrase reflects a strong and unwavering commitment to a cause, even if it means facing challenges or obstacles until the very end. **

"Slips bis zum Bauchnabel" is a German phrase that translates to "underwear up to the belly button" in English. This phrase is used to describe underwear that has a high waistband, reaching up to the wearer's belly button. It is often used humorously or sarcastically to emphasize the high-waisted nature of the underwear. **

"Sehnsucht bis zum Heulen" is a German phrase that translates to "longing until it makes you cry" in English. It describes a deep, intense feeling of longing or yearning for something or someone, to the point where it becomes overwhelming and emotional. This phrase captures the depth of the emotional experience of longing for something that feels out of reach. **