Dwarf planet

Pluto in approximate true colour based on Hubble Space Telescope albedo data A dwarf planet is an object the size of a planet (a planetary-mass object) but that is neither a planet nor a moon or other natural satellite. More explicitly, the International Astronomical Union (IAU) defines a dwarf planet as a celestial body in direct orbit of the Sun[1] that is massive enough for its shape to be controlled by gravity, but that unlike a planet has not cleared its orbit of other objects.[2][3] However, only two of these bodies, Ceres and Pluto, have been observed in enough detail to demonstrate that they actually fit the IAU's definition. The classification of bodies in other planetary systems with the characteristics of dwarf planets has not been addressed.[17] History of the concept[edit] The IAU's final Resolution 5A preserved this three-category system for the celestial bodies orbiting the Sun. Name[edit] Characteristics[edit] *ME in Earth masses. Orbital dominance[edit] Size and mass[edit]

2012 March 12 - The Scale of the Universe Interactive Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2012 March 12 The Scale of the Universe - Interactive Flash Animation Credit & Copyright: Cary & Michael Huang Explanation: What does the universe look like on small scales? On large scales? Tomorrow's picture: dust before galaxies Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)NASA Official: Phillip Newman Specific rights apply.NASA Web Privacy Policy and Important NoticesA service of:ASD at NASA / GSFC& Michigan Tech.

Superfluid: Liquid Helium Phenomenon Video Sex Chromosome Specialization and Degeneration in Mammals To view the full text, please login as a subscribed user or purchase a subscription. Click here to view the full text on ScienceDirect. Sex chromosomes—particularly the human Y—have been a source of fascination for decades because of their unique transmission patterns and their peculiar cytology. Register an Account If you do not have an account, create one by clicking the button below, and take full advantage of this site's features.

Organic farming is rarely enough Organic farming is sometimes touted as a way to feed the world's burgeoning population without destroying the environment. But the evidence for that has been hotly debated. Now, a comprehensive analysis of the existing science, published in Nature1, suggests that farming without the use of chemical fertilizers and pesticides could supply needs in some circumstances. maxim.photoshelter.com/Alamy Strawberries are among the few crops that grow almost as well on organic farms as in conventional agriculture. “I think organic farming does have a role to play because under some conditions it does perform pretty well,” says Verena Seufert, an Earth system scientist at McGill University in Montreal, Canada, and the study’s lead author. Area under inspection Seufert's meta-analysis reviewed 66 studies comparing the yields of 34 different crop species in organic and conventional farming systems. Fruitful farming “This is where yield increases are most needed,” says Seufert.

10 of the World's Deadliest Plants — And How They Kill You 5 Fragrant Plants for a Small Space When I visit my mom she puts me to work 'dead-heading' her lavender. As I trim away the dead blossoms the smell of lavender surrounds me and attracts quite a few bees. It reminds me how important scent is in a garden and what an integral experience it is to losing yourself in the outdoors. In a small space like a balcony or small deck, using plants that give off a scent can make the experience that much richer. Here are 5 of my favorite fragrant plants perfect for a small space… 1. Lavender: There are hundreds of varieties of Lavender but we normally go for whatever the nursery has available and what smells the best. 2. 3. 4. 5. Of course there are roses and freesias and jasmine and basil and rosemary, the list goes on and on with plants that have amazing scents.