Imaginea zilei din astronomie - APOD (Astronomy Picture Of the Day)

Descoperă cosmosul! În fiecare zi apare o nouă imagine sau fotografie din universul nostru fascinant împreună cu o scurtă explicaţie scrisă de către un astronom profesionist.

30 Aprilie 2016

Moon over Makemake
Illustration Credit: Alex H. Parker (Southwest Research Institute)

Explicaţie: Makemake, second brightest dwarf planet of the Kuiper belt, has a moon. Nicknamed MK2, Makemake's moon reflects sunlight with a charcoal-dark surface, about 1,300 times fainter than its parent body. Still, it was spotted in Hubble Space Telescope observations intended to search for faint companions with the same technique used to find the small satellites of Pluto. Just as for Pluto and its satellites, further observations of Makemake and orbiting moon will measure the system's mass and density and allow a broader understanding of the distant worlds. About 160 kilometers (100 miles) across compared to Makemake's 1,400 kilometer diameter, MK2's relative size and contrast are shown in this artist's vision. An imagined scene of an unexplored frontier of the Solar System, it looks back from a spacecraft's vantage as the dim Sun shines along the Milky Way. Of course, the Sun is over 50 times farther from Makemake than it is from planet Earth.

Imaginea de mâine: Moon over Sunday


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Autori & editori: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
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Politica de confidenţialitate web a NASA şi anunţuri importante
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& Michigan Tech. U.