Most dwarf planets found to date — including Pluto, which was once considered a planet — reside in the Kuiper Belt, a vast collection of frozen objects that orbit our Sun about 30 to 50 astronomical units (AUs) away. One astronomical unit is the distance between the Earth and the Sun, ...
Some observations of mass in dim galaxies and themotions of dwarf galaxiesagree better with MOND than with Newtonian physics, a mystery that convincedStacy McGaughat Case Western Reserve University in Cleveland, Ohio, that it could be the way to go. But starting afresh with gravity continues to...
A quick note: in the interest of keeping things brief and brisk, I’m only going to talk about the planets commonly named in folkloric texts. That means poor, lonely Pluto gets only a brief mention and bodies like the dwarf planet Ceres are not going to get any attention. Similarly, the...
Scientists think our solar system could have hundreds of dwarf planets. So far only five are officially recognized. All of the following are dwarf planets, except for one. Which one is it? Pluto Ceres, Eris, Mercury, Haumea, Makemake. Meera! You were first on the buzzer. Tell me, which...
The Density of Mid-sized Kuiper Belt Object 2002 UX25 and the Formation of the Dwarf Planets The formation of the largest objects in the Kuiper belt, with measured densities of ~1.5 g cm-3 and higher, from the coagulation of small bodies, with meas... ME Brown - 《Astrophysical Journal...
He wrote the poems "Somewhere I Have Never Traveled" and "I carry Your Heart with Me." In his poem "(in Just-)", he descrives "luscious the little/lame balloonman" who "whistles far and wee." What poet was known for his unusual punctuation? (E.E.) Cummings None of these astronom...
Red Dwarf (dwarf M=dM) stars comprise over 75% of the stars in the Galaxy. The recent statistical analysis of exoplanet systems from the Kepler Mission indicates that about 15% of red dwarf stars host Earth-size planets orbiting in the liquid water Habitable Zones (HZ) of their host stars...
Nevertheless, it should be instructive to investigate this, as I'd simply taken the stability of a Keplerian orbit on faith, binary or no. Could you explain the background (if it's relatively simple) or point me to further reading (if it's more complicated)? Thanks. Aug 15, 2012 #6...
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The origin of pollution in white dwarf (WD) atmospheres is still debated. Most studies suggest the pollution arises from accretion of small minor planets, but the properties of polluting material, and in particular the evidence for water in some cases are not yet understood. Here we study the...