Sentences with phrase «like brown dwarfs»

Hosted by Zooniverse, the project invites you to follow in the bold footsteps of Clyde Tombaugh by combing images from NASA's WISE telescope to find objects that move, like brown dwarfs and planets.

The failure, thus far, to find large substellar objects like brown dwarfs or a Jupiter - or Saturn - class planet in a «torch» orbit (closer than the Mercury to Sun distance) around Xi Boötis A — with even the highly sensitive radial - velocity methods of Geoffrey W. Marcy and R. Paul Butler — bodes well for the possibility of Earth - type terrestrial planets around this star (Cumming et al, 1999).

Gravitational microlensing, on the other hand, results from the bending of light from much smaller and less massive stellar - type objects like brown dwarfs, red dwarfs, neutron stars, and black holes.

These MACHOs include planets and cold dead stars like brown dwarfs and black holes.

Once Naud's team had the entire spectrum, they realized the object had a very low temperature, with properties similar to substellar objects like brown dwarfs or planets.

The failure, thus far, to find large substellar objects like brown dwarfs or a Jupiter - or Saturn - class planet in a «torch» orbit (closer han the Mercury to Sun distance) around 107 Piscium — with even the highly sensitive radial - velocity technique of Geoffrey W. Marcy and R. Paul Butler — bodes well for the possibility of Earth - type terrestrial planets around this star (Cumming et al, 1999).

Cool objects like brown dwarfs can be invisible when viewed by visible - light telescopes, but their thermal glow — even if feeble — stands out in infrared light.

The space telescope is specially designed to observe cold objects emitting light at long wavelengths — objects like brown dwarfs.

Epsilon Indi ba is so cool that methane has been detected in its atmosphere and so it has been classified as the earliest T - type (T1 V), methane brown dwarf (McCaughrean et al, 2003)-- a «T - dwarf»), like the brown dwarf companion to Gliese 229.

Not exact matches

Brown dwarfs are not quite massive enough to shine like stars, but nor are they planets because they don't usually orbit stars.

Caltech astronomer Davy Kirkpatrick, who works on related research, says that brown dwarfs like this one seem to have compositions similar to those of the giant planets detected orbiting faraway stars.

Although brown dwarfs have no nuclear fire in their belly, they are hot enough to emit infrared radiation, just like a human body.

It's hard to know how they formed: The brown dwarfs seem too heavy to have formed from the slow agglomeration of material, like jumbo - sized planets such as Jupiter.

Like young stars, brown dwarfs are surrounded by protoplanetary disks in this artist conception.

«The atmospheric winds of brown dwarfs seem to be more like Jupiter's familiar regular pattern of belts and zones than the chaotic atmospheric boiling seen on the Sun and many other stars,» said study co-author Mark Marley at NASA's Ames Research Center in California's Silicon Valley.

Because it is so feeble, a brown dwarf tends to retain fragile elements like lithium that are quickly destroyed in normal stars — which makes the presence of lithium a good test of whether a small star is really a brown dwarf.

«Brown dwarfs are also much easier to observe because in general, they aren't lost in the glare of an exceedingly bright parent star like the majority of exoplanets are.»

«The brown dwarfs we were turning up before this discovery were more like the temperature of your oven,» said astronomer Davy Kirkpatrick, a WISE science team member at the California Institute of Technology in Pasadena, and lead author of a study on the 100 new brown dwarfs.

Because they do not burn bright like normal stars, brown dwarfs are difficult to spot, but they radiate enough heat to show up in the infrared.

«Finding brown dwarfs near our sun is like discovering there's a hidden house on your block that you didn't know about,» said astronomer Michael Cushing, a WISE team member at NASA's Jet Propulsion Laboratory in Pasadena, Calif., and lead author of the study on the Y dwarfs.

«It is quite possible that not only brown dwarfs are still hiding in the observational data, but also other objects with even smaller, planetary - like masses.

Although brown dwarfs have a mass more like Jupiter's than like the sun's, if one of them passed through the Oort cloud it could still send plenty of comets our way.

Now, researchers have found two brown dwarfs that are colder than any previously seen — so cold and so small that they are almost like giant planets.

Similarly - aged stars moving through space together in a group — described by astronomers as an association — are of great interest to researchers, because they are considered a prime target to hunt for brown dwarfs and free - floating planet - like objects.

«Brown dwarfs are strikingly similar to Jupiter so we study their atmospheres in order to look at what weather on other worlds might look like,» said Jonathan Gagné, a Backyard Worlds team member from the Carnegie Institution for Science.

For the moment, data on brown dwarfs can be used as a stand - in for contemplating extrasolar worlds we hope to study with future instruments like the James Webb Space Telescope.

Brown dwarfs start their lives like stars, as collapsing balls of gas, but they lack the mass to burn nuclear fuel and radiate starlight.

Astronomers like to find such disks because they might be able to catch the star partway through the planet formation process, but it's highly unusual to find such disks around brown dwarfs or stars with very low masses.

Brown dwarfs are not considered stars because they are too small to fuse hydrogen in their cores — they don't have the gravitational oomph in their core to sustain hydrogen fusion, but, depending on how massive they are, they do have enough mass to sporadically fuse elements like lithium and deuterium.

«It looks like we're going to have to re-examine how we believe brown dwarfs work,» he said.

In fact, while methane is a atmospheric characteristic of giant gas planets like Jupiter, the only brown dwarf found to even have a trace of methane was Gliese 229 B, which orbits a reddish, M - class dwarf located about 20 light - years away from Earth.

The waves are an interesting piece of the puzzle: we see large - scale waves in the solar system planets (including Earth), but we have not yet seen waves with wavelengths similar to the entire planet — like the ones we now found in brown dwarfs.

Initially, we expected that the changes we see are driven by Great Red Spot - like stable features (the GRS has been seen in Jupiter for more than 300 years)-- but the brightnesses of the brown dwarfs changed way too much to be explained by spots, Waves, however, worked extremely well.

Like boiling water in a kettle, the material is heated near the brown dwarfs» cores, causing it to rise.

But if this active magnetic region is long - lasting and representative of its global magnetic field, LSR J1835 +3259 is way more «star - like» than we give brown dwarfs credit for.

Caltech astronomer Ben Oppenheimer, who helped to discover the apparent brown dwarf, Gliese 229 B, is part of a growing group that would like to define a brown dwarf as an substellar object with the mass of 13 to 80 (or so) Jupiters.

Evidently, despite being more similar to hot Jupiters than to isolated brown dwarfs in terms of external forcing of the atmosphere by stellar insolation, KELT - 1b has an atmosphere most like that of other brown dwarfs.

But if Jupiter were 13 times more massive and considered a small brown dwarf, it would start to exhibit some star - like qualities.

We found that brown dwarfs are similar to the gas giants in the Solar System (in that they have zonal circulation), but that they are more like Neptune and less like Jupiter (their brightness variations are driven by large - scale waves in zones rather than Great Red Spot - like storms as in Jupiter).

Thus the name «brown dwarf,» because they are dark bodies, not generating enough energy to glow like a star.

Among brown dwarfs themselves, we have cases like 2M1207b, MOA -2007-BLG-192Lb and 2MASS J044144.

A brown dwarf is more like a star, producing some kind of stellar wind emissions, though that's probably much less energetic than the radiation belts of Jupiter.

Or will be until infrared surveys like WISE tell us just how common brown dwarfs really are in our stellar neighborhood.

© John Whatmough (Artwork from Extrasolar Visions, used with permission) Xi Ursae Majoris Bb (HD 98230 b) appears to be too massive to be a brown dwarf — like Gliese 229 b with its own dark satellite, as imagined by Whatmough.

Astronomers have also found planets that orbit pairs of stars rather than single stars, and other planets orbiting «failed» stars called brown dwarfs that aren't mighty enough to produce light and energy (or carry out fusion) like normal stars do.

Small stars, like the Sun, will pass through a planetary nebula phase to become a white dwarf, this eventually cools down over time leaving a brown dwarf.

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.

According to Burgasser, the presence of molecules like methane or ammonia, which can only survive at cold temperatures, suggest an object is a brown dwarf.

DID N'T LIKE: Thorin's attitude, the rudeness of the dwarves when they first entered the house, Bilbo's leaving on his own (Gandalf didn't come back for him), Radagast the Brown (too goofy, I always pictured a more St. Francis - like character), the way the scene at the end - with Gandalf and the dwarves up in the trees, was totally ruined, and the loss of Bilbo's progression as a character (did he really kill several creatures all reLIKE: Thorin's attitude, the rudeness of the dwarves when they first entered the house, Bilbo's leaving on his own (Gandalf didn't come back for him), Radagast the Brown (too goofy, I always pictured a more St. Francis - like character), the way the scene at the end - with Gandalf and the dwarves up in the trees, was totally ruined, and the loss of Bilbo's progression as a character (did he really kill several creatures all relike character), the way the scene at the end - with Gandalf and the dwarves up in the trees, was totally ruined, and the loss of Bilbo's progression as a character (did he really kill several creatures all ready?

I have 2 dwarf hamsters bought from the same place but a year apart they told me both were robo one has a tail the other one don't newest one has a white underneath and brown top no tail and likes to burrow under her bedding my oldest has a gray underneath brown top with a black stripe down the middle of her back and a tail that's about an inch or so long she likes to sleep a lot and out at night between 9 - 11 pm when it's dark can someone tell me the difference and what kind they are