Cosmos Daily 🚀: “look up tonight ROSAT Explores The X-Ray Sky Launched in…”

look up tonight ROSAT Explores The X-Ray Sky Launched in 1990, the orbiting ROSAT observatory explored the Universe by viewing the entire sky in x-rays -- photons with about 1,000 times more energy than visible light. This… 📷 NASA APOD #space #nasa #astronomy #cosmos #science