On August 27, the Hubble Space Telescope has captured several significant cosmic observations on various years, but one notable event is its closest view of Mars on August 27, 2003. During this time, Hubble snapped a detailed portrait of Mars when the planet was at its closest approach to Earth in nearly 60,000 years, producing some of the sharpest images of Mars from space until that point.
Additionally, Hubble has continuously observed fascinating cosmic wonders every day of the year, including on birthdays like August 27, such as nebulae, galaxies, star clusters, and more. For example, the "Egg Nebula," a pre- planetary nebula with a star transforming into a white dwarf, is an example of a Hubble observation on a birthday, though the exact observation for your specific birth year on August 27 would depend on the date and mission schedule.
If a specific year's observation is desired, the Hubble Birthday image tool or archives can be consulted for that day's exact Hubble image. In summary, on your birthday August 27, Hubble notably captured its closest view of Mars in 2003 and many other cosmic wonders depending on the year in question.