Sun's core (max) — 160,000 kg/m3 Super-massive black hole — 9×105 kg/m3 White dwarf star — 2.1×109 kg/m3 Atomic nuclei — 2.3×1017 kg/m3 Neutron star — 4.8×1017 kg/m3 Stellar-mass black hole — 1×1018 kg/m3 🔎 Fun fact: Although the universe consists of many super...
Students plan and experiment to establish the Law of Conservation of Mass using Alka-Seltzer and a flask. According to the rule of conservation of mass, mass cannot be created or destroyed. This states that in a chemical process, the total mass of reactants equals the total mass of products...
Many free-living passerines lay one egg per day and, in some species at least, daily timing of egg-laying is highly synchronous and occurs very soon after sunrise, i.e., there is a strong circadian pattern of oviposition (consistent with the “open period” model, Etches, 1996). Most ...
Before the invention of the coronagraph (an instrument that places an occulting disk in front of the Sun to block out its bright light), the Sun’s corona was visible for only a few minutes during total solar eclipses, when the Moon acted as the occulting disk. With the advent of space...
Neptune, third most massive planet in the solar system and the eighth and outermost planet from the Sun. Neptune has 14 moons, only two of which were discovered before Voyager 2’s visit in 1989, and a system of rings, which were unconfirmed before Voyag
It is a measurement of how much matter (how many protons, neutrons, and electrons) make up an object. It is the same whether an object resides on Earth, or Mars, or even in outer space. And scientists usually measure it using units called grams. Mass and weight on Earth and Mars. ...
In this method, cells remain viable until the point of analysis, because they are not fixed with any media (Sun et al., 2010; Magness et al., 2017; Tune et al., 2016; Liu and Singh, 2013; Willison and Klug, 2013). 14.4.1.6 Proximity Extension Assay/Abseq This assay uses a pair...
Here we report the sizes and masses of three planets orbiting Kepler-138, a star much fainter and cooler than the Sun. We determine that the mass of the Mars-sized inner planet, Kepler-138 b, is 0.066(+0.059)(-0.037) Earth masses. Its density is 2.6(+2.4)(-1.5) grams per cubic ...
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The Sun, for example, is much more massive than any other body, yet you'd "only" weigh about 28 times more. Of course, you'd die on the Sun from the massive heat and other radiation, but even if it were cold, the intense gravity on a planet that size would be deadly....