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searching for Solar luminosity 24 found (275 total)

Owl Nebula (1,554 words) [view diff] exact match in snippet view article find links to article

form a white dwarf. It has 55–60% of solar mass, is 41 to 148 times solar luminosity (L☉), and has an effective temperature of 123,000 K. The star has been

100,000-year problem (2,557 words) [view diff] exact match in snippet view article find links to article

sheets. A mechanism that may account for periodic fluctuations in solar luminosity has also been proposed as an explanation. Diffusion waves occurring

Runaway greenhouse effect (4,801 words) [view diff] exact match in snippet view article find links to article

experience a runaway greenhouse effect "in about 2 billion years as solar luminosity increases". While the term was coined by Caltech scientist Andrew Ingersoll

Messier 72 (632 words) [view diff] exact match in snippet view article find links to article

The core region has a density of stars that is radiating 2.26 times solar luminosity (L☉) per cubic parsec. There are 43 identified variable stars in the

S5 0014+81 (785 words) [view diff] exact match in snippet view article find links to article

Journal. 275: L33. Bibcode:1983ApJ...275L..33K. doi:10.1086/184166. Solar luminosity is 3.846 × 1026 watts. "Sun Facts". nasa.gov. 14 January 2015. The

Solar activity and climate (7,647 words) [view diff] exact match in snippet view article find links to article

current power. Under the present atmospheric composition, this past solar luminosity would have been insufficient to prevent water from uniformly freezing

Solar phenomena (5,243 words) [view diff] exact match in snippet view article find links to article

Scientists began speculating on possible relationships between sunspots and solar luminosity in the 17th century. Luminosity decreases caused by sunspots (generally

Bolometric correction (1,349 words) [view diff] exact match in snippet view article find links to article

in 1999 (with a slightly different zero point, tied to an obsolete solar luminosity estimate) was adopted by IAU Commissions 25 and 36. However it never

LHS 1140 b (1,630 words) [view diff] exact match in snippet view article find links to article

Sun is 1 solar mass and radius, has a temperature of 5778 K with 1 solar luminosity, is 4.5 billion years old, and has the spectral type of G2V. In addition

Poynting–Robertson effect (1,363 words) [view diff] exact match in snippet view article find links to article

the universal gravitational constant, M☉ the Sun's mass, L☉ is the solar luminosity, and R the grain's orbital radius. The Poynting–Robertson effect is

Nicola Scafetta (1,308 words) [view diff] exact match in snippet view article find links to article

Scafetta, disagree and argue for a significant upward trend in average solar luminosity during the two-year data-gap in the ACRIM time series. The Duke University

Orders of magnitude (power) (2,726 words) [view diff] exact match in snippet view article

RealClearScience". Realclearscience. Retrieved November 22, 2020. Calculated as: Solar luminosity × 10^(0.4 × (Sun absolute magnitude - 3C 273 absolute magnitude)) =

Carbonate–silicate cycle (2,593 words) [view diff] exact match in snippet view article find links to article

and draw down of carbon dioxide. Seafloor weather is linked both to solar luminosity and carbon dioxide concentration. However, it presented a challenge

TimeTree (809 words) [view diff] exact match in snippet view article find links to article

shown next to the timescale for comparison, including Earth impacts, solar luminosity, carbon dioxide levels, and oxygen levels. Separately, a table lists

Freshwater phytoplankton (1,298 words) [view diff] exact match in snippet view article find links to article

the time period in which they evolved. About 3.8 billion years ago solar luminosity was ~30% lower than present conditions. Cyanobacteria were able to

Nature (9,641 words) [view diff] exact match in snippet view article find links to article

ocean currents, surface albedo, greenhouse gases, variations in the solar luminosity, and changes to the Earth's orbit. Based on historical and geological

Seyfert galaxy (5,701 words) [view diff] exact match in snippet view article find links to article

}}}L_{\odot }\end{aligned}}} where M☉ is the mass of the Sun and L☉ is the solar luminosity. Therefore, given the observed luminosity (which would be less than

Gaia hypothesis (9,256 words) [view diff] exact match in snippet view article find links to article

"Earth: An enhanced carbon dioxide greenhouse to compensate for reduced solar luminosity". Nature. 277 (5698): 640–2. Bibcode:1979Natur.277..640O. doi:10.1038/277640a0

B Centauri b (818 words) [view diff] exact match in snippet view article find links to article

0.4. The SPHERE images show the planet has approximately 0.01% the solar luminosity, a relic of its recent formation. From this luminosity and the age

Climate of Mars (11,740 words) [view diff] exact match in snippet view article find links to article

than a global one. The researchers showed that even with a constant solar luminosity the poles were capable of jumping between states of depositing or losing

Boring Billion (8,157 words) [view diff] exact match in snippet view article find links to article

during this time period. Climate was likely not primarily dictated by solar luminosity because the Sun was 5–18% less luminous than it is today, but there

Daisyworld (3,328 words) [view diff] exact match in snippet view article find links to article

to regulate the climate, making it habitable over a wide range of solar luminosity. Many examples of these regulatory systems have been found on Earth

82 G. Eridani d (1,796 words) [view diff] exact match in snippet view article find links to article

the Sun's mass and 92% of the Sun's radius. It irradiates 60% of the solar luminosity from its photosphere at an effective temperature of 5,470 K (5,200 °C)

Sun in fiction (6,841 words) [view diff] exact match in snippet view article find links to article

evolution of humanity throughout millions of years of variation in solar luminosity. Stories depicting the Sun waning nevertheless kept appearing, such