Sentences with phrase «orbital periods as»

For instance, we don't understand what is the physical mechanism that forms Jupiter - like planets with orbital periods as little as a few days.

Kepler, which will keep a continuous watch on a patch of stars for more than three years, is better suited to finding planets like our own in terms of orbital periods as well as other parameters, although it will likely be a few years before it moves from the hot objects it has already discovered to cooler, potentially habitable worlds, whose transits are subtler and less frequent.

A calendar year is an approximation of the number of days of the Earth's orbital period as counted in a given calendar.

Not exact matches

Some years ago, when AAAS launched an effort to reform science education, it said that true reform will take about as long as Halley's Comet's orbital period [of about 76 years]-- that's why they labeled their initiative Project 2061.

Once confirmed, a transit allows astronomers to confidently measure a planet's orbital period — its year — as well as to estimate its size, by comparing the depth of its shadow with the estimated dimensions and luminosity of its star.

That means its orbital period is the same as its rotation around its axis.

Mars's orbital period of 1.88 years means that if it is on the same side of the sun as one Jupiter - Saturn meeting, it will be nearly on the opposite side the next time around.

Little is known about these faraway worlds beyond bulk properties such as their orbital periods, estimated masses and, on relatively rare occasions, their diameters.

These moons have orbital periods exactly 2 and 4 times as long as Io's, which results in the three moons lining up every so often.

Note that functional form extrapolations for planet occurrence rates as a function of orbital period may also differ.

Actually finding an Earth - sized world circling as far from its star as Earth orbits the sun will take 365 days of observations to detect one pass, plus another year or two of data to verify the orbital period.

Plotted as mass vs. orbital period (left) but excluding Kepler discoveries.

Planet occurrence as a function of planet size and planet orbital period.

This chart shows, on the top row, artist concepts of the seven planets of TRAPPIST - 1 with their orbital periods, distances from their star, radii and masses as compared to those of Earth.

The orbit of an Earth - like planet (with liquid water) around close - orbiting Stars A and B may be centered as close as 1.06 AU — between the orbital distances of Earth and Mars in the Solar System — with an orbital period of over 384 days (1.05 years).

Here we report observations of the bright star HD 195689 (also known as KELT - 9), which reveal a close - in (orbital period of about 1.48 days) transiting giant planet, KELT - 9b.

As a result, for approximately 13 to 20 years out of the every 248 (Pluto's orbital period), Neptune lies farther from the Sun than Pluto.

Led by Lars A. Buchhave, from CfA, the study shows a connection between the orbital period of the planet and its size as it changes from a rocky planet to a gas giant.

Abstract: Kepler - 78 (KIC 8435766) was identified by Sanchis - Ojeda et al. (2013) as harbouring a transiting planet of 1.16 times the size of the Earth and an orbital period of only 8.5 hours.

Periods of volcanism can cool the climate (as with the 1991 Pinatubo eruption), methane emissions from increased biological activity can warm the climate, and slight changes in solar output and orbital variations can all have climate effects which are much shorter in duration than the ice age cycles, ranging from less than a decade to a thousand years in duration (the Younger Dryas).

During the orbital period of such a planet of 0.6 (3) a, an observer on the planet would see this intensely bright companion star circle the sky just as humans see with the Solar System's planets.

This planet has an orbital period similar to that of HD 209458b, but about twice as long as those of the OGLE transiting planets.

The orbit of an Earth - like planet (with liquid water) around Star A may be centered as close as 1.8 AU — between the orbital distances of Mars and the Main Asteroid Belt in the Solar System — with an orbital period of 2.2 years.

In this study, we use correct relations between orbital and rotational periods to show that the inner edge of the habitable zone around low mass, cool stars is not as close as the estimates from previous studies.

Astronomers who attempted to map Mercury thus agreed that the planet probably had a rotation period as long as its orbital period.

As I understand it, they are more or less trying to equate the 0.8 C per 1 W / m ^ 2 needed for a 3C rise from 2xCO2 (0.8 x 3.7 = 3C) to the +7 W / m ^ 2 of net incident solar from the orbital change that ultimately resulted in about an increase of 5 - 6C from the LGM to the current interglacial period (0.8 x 7 = 5.6 C).

Since a 2005 visit by NASA's Deep Impact spacecraft, the short - period comet has completed more than one complete orbit around the Sun and approached the inner Solar System as close as the orbital distance of Mars.

The orbit of an Earth - like planet (with liquid water) around Star B may be centered as close as 0.09 AU — well within the orbit distance of Mercury — with an orbital period of just around 22 days.

If the foreground star happens to have any planets orbiting it, these will distort and dim the light from the background star in a noticeable way as well, which will help astronomers measure some of their basic properties, like their mass and orbital period.

Between 5 and 10 percent of stars surveyed have planets at least 100 times as massive as Earth with orbital periods of a few Earth years or less.

Their transit depth is displayed here as a function of their orbital period.

The observed shift in the Hulse - Taylor binary's orbital period over time as it loses energy to gravitational - wave emission.

Lead study author Fabio Feng of the University of Hertfordshire told Gizmodo that we should be cautious defining the habitable zone of exoplanets, but he said he regards the two outer planets as «habitable zone candidates,» especially since their orbital periods are not precisely known.

Saturn is also a giant planet with a 30 year orbital period, and the two planets will produce high (spring) tides when they are aligned with the sun every ~ 22.3 years, and when they are aligned in the the center of the galaxy as well every 178.7 years.

I was thinking instead perhaps more easily controlled polar - orbit satellites might be used, which would rotate with some fixed ratio to their orbital period, casting greater shadows at higher latitudes... or some other arrangment... for a targetted offset polar amplification of AGW especially and in particular perhaps avoiding the reduction in precipitation that can be caused by SW - radiation - based «GE» (although aerosols that actually absorb some SW in the troposphere while shielding the surface would have the worst effect in that way, I'd think)... strategic distribution of solar shading has been suggested with precipitation effects in mind, such as here... sorry, I don't have the link (I'm sure I saved it, just as Steve Fish would suggest — but where?).

As these particular events took place at the end of a local warm period caused by orbital forcing (see Box 6.1 and Section 6.5.1), these observations suggest that under gradual climate forcings (e.g., orbital) the climate system can change abruptly.

Short term solar cycles of the 27 day rotation periods, due to the polarity shifts in magnetic flux changes in the solar wind, The moon has a North / South declinational component as part of it's set of orbital parameters.

Individual discrepancies have been explained, for example, through interactions between other orbital frequencies such as obliquity and the 413,000 - year period of eccentricity but a unified explanation is lacking.

The middle case makes more sense to me as is because it was a relatively stable period of CO2 concentration, the system was more or less at equilibrium, 2,000 years is just on the threshold of where orbital forcing becomes significant, etc..

If the Babcock mechanism for reversing the polarity also operates on the star, each cycle will have opposite polarities as an incidental consequence of the Babcock mechanism, but that does not alter the fact that the generation of activity by the tides is the fundamental process with a period equal to the orbital period of the planet.

That there is also a bulge on the backside of the star is irrelevant as the star is rotating rapidly compared to the orbital period of the planet.

Modern research have further confirmed that: (1) the planetary orbital periods can be approximately deduced from a simple system of resonant frequencies; (2) the solar system oscillates with a specific set of gravitational frequencies, and many of them (e.g. within the range between 3 yr and 100 yr) can be approximately constructed as harmonics of a base period of ∼ 178.38 yr; (3) solar and climate records are also characterized by planetary harmonics from the monthly to the millennia time scales.

The baseline or ambient temperature at this time during the current inter-glacial (Holocene) period is entirely attributed to the combination of various natural celestial cycles such as solar energy output, and orbital mechanics of axial tilt, procession, and positions of the hemispheres during progression of the orbital ellipse.

We love the beautifully engraved details, which include planet names and distances from the sun as well as orbital periods and asteroids.