palau’s jellyfish lake was once connected to the pacific ocean, but when the sea level dropped its population of jellyfish were left to thrive in the isolation of its algae rich waters. no longer needing to defend themselves from predators, the jellyfish lost their sting, allowing snorkelers to now swim with them as they make their daily 800 metre migration from one end of the lake to the other.
Filaments on the Inner Ring of the Helix Nebula
This cropped version of the Helix Nebula (also known as NGC 7293) mosaic shows cometary-filaments embedded along a portion of the inner rim of the nebula’s red and blue gas ring. The Nebula is in the constellation Aquarius at a distance of 650 light-years from Earth. The Helix is one of the nearest planetary nebulae to Earth and it a frequency target of study. Because of its ere stare it is sometimes called the “Eye of God”.
Credit: NASA/ESO/Hubble/Helix Imaging Team