Astronomers don't have a specific dress code like surgeons or firefighters. Their attire depends on where they're working and what they're doing:

* In the office: They usually wear comfortable and casual clothes, similar to any office worker. Jeans, t-shirts, sweaters, and sneakers are common.

* At an observatory: Depending on the weather, they might wear layers to adjust to temperature changes. If working with telescopes outdoors, they may wear sturdy shoes for walking on uneven terrain.

* For observing: When working with telescopes at night, they'll wear dark clothing to avoid distracting light.

* For conferences and presentations: They might dress more formally, wearing suits or dresses for presentations and public speaking.

Overall, the most important thing is that astronomers wear comfortable clothing that allows them to move freely and focus on their work. Their attire is more about practicality and functionality than fashion.