Superflares - According to one recent hypothesis, unusually intense stellar flares from a sun - like («Sol - type») star could be caused by the interaction of the magnetic field of a giant planet
in tight orbit with that star's own magnetic field.
Not exact matches
Instead, you're propelling it forward and back
in a
tight elliptical
orbit,
with a little jolt of the wrist for necessary lift.
But given that the era of discovering extrasolar planets is still
in its infancy,
with methods that more easily detect planets if they are massive and
in tight orbits, how can we be certain that the exoplanets discovered so far are typical?
That parts - per - million sensitivity should allow Corot to detect the dips
in a star's light caused by a transiting planet
with a radius just twice that of Earth — and perhaps an even smaller one, provided its
orbit is
tighter than Mercury's, so that the planet completes three transits during the 150 - day viewing period.
However, other predictions, such as not expecting massive planets
in tight orbits, is still largely contradictory to the hypothesis and greater testing
with additional discoveries will be needed.
On October 16, 2012, a team of astronomers announced the discovery of a planet
with around 1.13 + / - 0.09 Earth - masses
in a very hot and
tight, circular
orbit around Alpha Centauri B, using the European Southern Observatory's the High Accuracy Radial velocity Planet Searcher (HARPS) instrument on the 3.6 - metre telescope at ESO's La Silla Observatory
in Chile.
The high temperatures experienced by Kepler - 13Ab are a result of its
tight orbit with its parent star, which has
in turn led to the world becoming tidally locked
with the stellar body.
On October 16, 2012, a team of astronomers announced the discovery of a planet
with around 1.13 + / - 0.09 Earth - masses
in a very hot and
tight, circular
orbit around Alpha Centauri B, using the European Southern Observatory's High Accuracy Radial velocity Planet Searcher (HARPS) instrument on the 3.6 - metre telescope at ESO's La Silla Observatory
in Chile.
The main finding is that WASP - 18b, a highly irradiated hot Jupiter
in a
tight orbit around a hot F - type star, is «wrapped
in a smothering stratosphere loaded
with carbon monoxide and devoid of water».
On June 16, 2008, a team of astronomers announced at the 2008 Extra Solar Super-Earths Workshop
in France their discovery of a «super-Earth» class planet
in a
tight orbit around this star
with with two other gas planets
in outer
orbits (ESO press release and Bouchy et al, 2009 — more details below).
On June 16, 2008, a team of astronomers announced at the 2008 Extra Solar Super-Earths Workshop
in France their discovery of one «super-Earth» type planet
in a
tight orbit around this star
with two other gas giant planets
in outer
orbits (ESO press release and Bouchy et al, 2009).
The
orbit of an Earth - like planet (
with liquid water) around this
tight binary (Aab) would have to be centered around 1.3 AUs — between the orbital distances of Earth and Mars
in the Solar System —
with an orbital period between one and two Earth years.
The
orbit of an Earth - like planet around the
tight binary system that star Ba forms
with its brown dwarf companion
in the liquid water zone would have to be centered around 1.1 AU — a little farther than Earth's orbital distance around Sol —
with an orbital period exceeding one Earth year.
Or we find a bunch of rocky planets — larger than Earth, but definitely rocky — gathered
in tight formation around a star (
with orbits that last 3.7 days!
On September 6, 2007, a team of astronomers (Michael Endl, William D. Cochran, Robert A. Wittenmyer, and Alan P. Boss) submitted a paper on the discovery of a Neptune - class planet (of at least 24.5 Earth - masses or 0.0771 Jupiter - masses)
in a
tight inner
orbit (a = 0.0727 ± 0.0007 AUs)
with a period less than 10.24 days, based on data from the HRS spectrograph on the Hobby - Eberly Telescope (Endl et al, 2008; and their web page on GJ 176 — more below).