We have multiple openings for undergraduate students to engage in practical research experience to further their educational goals within Lawrence Livermore National Lab’s (LLNL) Space Science Institute (SSI). Opportunities include participation in projects led by LLNL scientists in research areas including: Astrophysics and cosmology (Optical astronomy and cosmology, X-ray astrophysics, and X-ray laboratory astrophysics), Planetary science (Cosmochemistry, and Planetary defense), Technology and instrument development (Adaptive optics, Gamma-ray spectrometers, SmallSat capabilities for science missions, and X-ray and extreme ultraviolet optics). These positions are in the Space Science Institute summer internship program. Details about LLNL's Space Science Institute may be found at: https://space-science.llnl.gov . SSI summer internship assignments are 10-12 weeks starting from early June to mid-September. Please submit both a curriculum vitae and a cover letter. The cover letter should be no more than one page and should include a description of why you wish to work at LLNL and how you would like to contribute to SSI research at LLNL. To receive full consideration, applications must be submitted by January 22, 2027. This position requires full-time on-site presence due to the nature of the work. You will  Work with scientists conducting research in astronomy, planetary science or a related field. This may include experiments, data analysis and interpretation, theory or modeling simulation, and/or isotopic analysis of planetary materials. Conduct research in assigned areas under close direction and supervision. Perform scientific assignments at an appropriate level of complexity and work collaboratively on scientific research and development projects. Analyze results and provide weekly updates. Present work through presentations and/or poster sessions. Perform other duties as assigned.