Because of atmosphere's absorption, Ultraviolet (UV) radiation must be observed from space, which is much harder than ground observations. Because of this, we still knows quite little about UV spectrum of asteroids, which are usually classified according to their optical/IR spectra. Fortunately, Swift uniquely has the UV capability and time to measure UV spectra of ~20 asteroids. **Will their types keep the same in UV? Will there be some new trends? How will the results affect the understanding of the solar system?** We are extracting the spectra, let's look forward to the results!
What does the **first** known active **comet from another star** looks like? **2I/Borisov**, the comet, visited us in late 2019, and telescopes around the world observed it ~~to see if it an alien's spacecraft~~ to explore its properties. Our teams successfully used UVOT/Swift to measure its water, and COS/HST to measure its carbon monoxide. The interesting conclusions can be learned from the following buttons.