A satellite in space took a picture of a double eclipse when both Earth and the Moon moved between the satellite and the Sun at the same time. Some students claim that they could see a double eclipse from Earth if a lunar and a solar eclipse happened at the same time. They wonder if they could ever see that type of double eclipse from their town. Scientists took a picture of a solar eclipse on Mars that involved the Sun, Mars, and one of Mars's moons, called Phobos. The students want to draw a model to show how the eclipse happened. What is the position of Phobos relative to Mars and the Sun during a solar eclipse on Mars? Move Phobos to a box complete the model. Sun Light Mars *not drawn to scale

solar eclipse occurs when a portion of the Earth is engulfed in a shadow cast by the Moon which fully or partially blocks sunlight. This occurs when the Sun, Moon and Earth are aligned. Such alignment coincides with a new moon (syzygy) indicating the Moon is closest to the ecliptic plane.[1] In a total eclipse, the disk of the Sun is fully obscured by the Moon. In partial and annular eclipses, only part of the Sun is obscured.

Total solar eclipse

A total solar eclipse occurs when the Moon completely covers the Sun's disk, as seen in this 1999 solar eclipse. Solar prominences can be seen along the limb (in red) as well as extensive coronal filaments.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".