The star XO-1, in particular, was marked as a promising candidate in June 2005. The amateur astronomers observed it from June to July 2005, eventually confirming that a planet-sized object was eclipsing it.
The star XO-1, in particular, was considered an interesting target in June 2005. Amateur astronomers observed it between June and July 2005 and ultimately found evidence of a planet-sized object passing in front of it.