Answer:
The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet. Essentially Pluto meets all the criteria except one—it “has not cleared its neighboring region of other objects.”
Answer:
Luminous; distance travelled
Explanation:
Cepheids, also called Cepheid Variables, are stars which brigthen and dim periodically. This behavior allows them to be used as cosmic yardsticks out to distances of a few tens of millions of light-years. a uniform function of their brightness. The reason Cepheids can be used to determine distance is because the are variable stars that change brightness according to a regular pattern Cepheid variable discovery allows one to know the true luminosity of a Cepheid by simply observing its pulsation period. This in turn allows one to determine the distance to the star, by comparing its known luminosity to its observed brightness.
Answer:
Mercury is the closest planet to the sun. Earth is the closest planet to the sun that has life on it.
Answer: From Earth POV, the new moon will appear to be completely dark, while the full moon, it will appear completely lit up
Explanation: In the new moon phase, the moon is in between sun and earth, the new moon phase is lit on the side of the moon thats facing the sun, while dark on the side facing the earth, in the full moon phase, the side of the moon facing the sun is also facing earth, making it visible completely.
Answer:
I'm pretty sure the answer is 10.
Explanation: