Physicists often work regular hours in laboratories and offices. At times, however, those who are deeply involved in research may work long or irregular hours. Most do not encounter unusual hazards in their work. Some physicists temporarily work away from home at national or international facilities with unique equipment, such as particle accelerators. Astronomers who make observations with ground-based telescopes may spend long periods in observatories; this work usually involves travel to remote locations and may require long hours, including night work.
Physicists and astronomers whose work depends on grant money often are under pressure to write grant proposals to keep their work funded.