Solar System Grade 4 royal school 4th grade enero 2012 4 Solar Grade System

Solar System Grade 4 royal school 4th grade enero 2012 4 Solar Grade System

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It is important to know at any age!

Moon jellyfish (Aurelia aurita) are from the phylum Cnidaria. This phylum contains over 9,000 aquatic species. There are 10 nearly identical species in the genus Aurelia collectively referred to as moon jellyfish. In fact, they are so close morphologically that it takes DNA testing to distinguish one species from another.

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The harmful effects of radiation are based both on its strength and the time of exposure to its source. Average human would need to spend nearly four months inside the Van Allen belts to accumulate a lethal dose. The astronauts managed to pass through them during less than one hour. Regarding the time spent out of Earth's magnetic field, where the astronauts were exposed to solar radiation, an average human could endure a radiation exposure equivalent to one-way trip to Mars and still not receive a dose which exceeds lifetime levels set up by NASA.

and finally

Galileo Galilei first spotted the planet Neptune with his primitive "spyglass" on December 28, 1612. He observed it again on January 27, 1613. Unfortunately, on both occasions, Galileo thought that the giant, remote planet was a fixed star, appearing near the planet Jupiter in the dark night sky. Because of this mistake, Galileo is not credited with the discovery of Neptune.

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In order to shed new light on the mysterious origins of the surviving duo of Martian moons, the researchers conducting this study combined their expertise in astrophysics, planetary science, computer science, and mathematics in order to create complex supercomputer models. The models ran a range of hydrodynamic and numerical simulations able to recreate the sequence of ancient events. Their findings strengthen the hypothesis that a horrific blast in the past formed the moons of Mars--originally a collection of moons and moonlets.

Planetary scientists usually calculate the Moon's age by using the radioactive decay of elements like uranium, explained Dr. John Chambers in the April 2, 2014 National Geographic News. Dr. Chambers is a planetary scientist at the Carnegie Institution for Science in Washington, D.C. By studying an element with a recognized decay rate, and knowing its concentration in Moon rocks or the Earth's surface, scientists are able to calculate back in time to when the material first formed. However, there are numerous and varying radioactive materials that can provide differing timelines, added Dr. Chambers, who was not involved in the study.

Another interesting piece of Apollo 11 trivia is the fact that the Apollo missions had actually been ongoing and this was actually the fifth mission of Project Apollo that involved human spaceflight. Aside from that, it was also the third voyage by humans to the moon; however, no human had ever stepped foot on the moon until this specific voyage.