Canada>Canada diflucan prescription uk This is actually similar to how HD 189733b was discovered in the first place. In 2005, French astronomers observed the planet transit in front of its star using the normal optical wavelengths that our eyes use. Indeed, most planets outside of our solar system have been discovered in this manner. When a planet transits, it causes part of the starâs brightness to dim as the planet passes in front of the star. Similarly, astronomers at Chandra and Newton viewed the planet pass in front of the star using X-ray wavelengths, noting a visible âdipâ in the X-ray intensity of the planetâs star where HD 189733b passed in front of it.