The moon in total lunar eclipse over the Lebanese city of Tannourine in the mountains north of Beirut. The longest

The moon in the total lunar eclipse over the Lebanese city of Tannourine in the mountains north of Beirut. The longest "blood moon" eclipse of this century began on July 27, coinciding with the closest approach in 15 years of March. Photo: JOSEPH EIDJOSEPH EID / AFP / Getty Images

<img fsheight = "953" fswidth = "1440" data-mod-mobile = "landscape_620" data-desktop = "landscape_685" clbad = "gallery__img responsive-img" data-mod-desktop = "fullsize" data- mod-tablet = "landscape_940" title = "The full moon during a" blood moon "eclipse alongside the planet Mars as seen from Siliguri, India, on July 28th, 2018. The longest" blood moon "eclipse this century began on July 27th , coinciding with the closest approach by Mars in 15 years.Photo: DUTADIPTENDU DIPTENDU DUTTA / AFP / Getty Images
"itemprop =" contentUrl "alt =" The full moon during an eclipse of "blood moon" along the planet Mars seen from Siliguri, India, July 28, 2018. The longest eclipse of "moon" "blood" started in July 27, coinciding with the closest approach to Mars in 15 years. Photo: DUTADIPPENDENT DUTTA / AFP / Getty Images

The moon is seen on Frankfurt, Germany. Photography: REUTERS / Kai Pfaffenbach

The moon is seen on Frankfurt, Germany. Photography: REUTERS / Kai Pfaffenbach

A composite photo shows the lunar eclipse seen over the city of Kuwait. EPA / Noufal Ibrahim Photography

A composite photo shows the moon eclipse seen over Kuwait City. EPA / Noufal Ibrahim Photography

This combination of 14 images shows the moon during a total lunar eclipse near the town of La Puente, on the Spanish island of Tenerife. Photography: DESIREE MARTINDESIREE MARTIN / AFP / Getty Images

This combination of 14 images shows the moon during a total lunar eclipse near the town of La Puente, on the Spanish island of Tenerife. Photography: DESIREE MARTINDESIREE MARTIN / AFP / Getty Images

The moon is shown next to a statue of the ancient Greek goddess Hera in central Athens. Photo: AFP PHOTO / Aris MESSINISARIS MESSINIS / AFP / Getty Images

The moon is shown next to a statue of the ancient Greek goddess Hera in central Athens. Photo: AFP PHOTO / Aris MESSINISARIS MESSINIS / AFP / Getty Images

The eclipsed moon is shown next to a statue of the ancient Greek god Ares in central Athens. Photo: AFP PHOTO / Aris MESSINISARIS MESSINIS / AFP / Getty Images

The eclipsed moon is shown next to a statue of the ancient Greek god Ares in central Athens. Photo: AFP PHOTO / Aris MESSINISARIS MESSINIS / AFP / Getty Images

The moon appears next to a statue of the ancient Greek gods Hera (R) and god Apollo in the center of Athens. Photography: Aris MESSINISARIS MESSINIS / AFP / Getty Images

The moon appears next to a statue of the ancient Greek gods Hera (R) and god Apollo in the center of Athens. Photography: Aris MESSINISARIS MESSINIS / AFP / Getty Images

The moon rises behind the Saentis (2502m) Alpstein, canton of Appenzell, Switzerland. Photography: EPA / CHRISTIAN MERZ

The moon rises behind the Saentis (2502m) Alpstein, canton of Appenzell, Switzerland. Photography: EPA / CHRISTIAN MERZ

The moon is seen during a lunar eclipse in Cairo, Egypt. Photography: REUTERS / Amr Abdallah Dalsh

The moon is seen during a lunar eclipse in Cairo, Egypt. Photography: REUTERS / Amr Abdallah Dalsh