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Stage of stellar evolution
In the field of stellar evolution, a blue loop is a stage in the life of an evolved star where it changes from a cool star to a hotter one before cooling
Blue_loop
Brightest star in the constellation of Carina
Canopus is undergoing core helium burning and is currently in the so-called blue loop phase of its evolution, having already passed through the red-giant branch
Canopus
Hot, luminous star with a spectral type of A9 or earlier
execute a number of blue loops before either exploding as a type II supernova or finally dumping enough of its outer layers to become a blue supergiant again
Blue_supergiant
Creation of chemical elements within stars
execute a blue loop before reaching the asymptotic giant branch. Such a star initially moves away from the AGB toward bluer colours, then loops back again
Stellar_nucleosynthesis
Stars with a supergiant luminosity class with a spectral type of K or M
experience a blue loop, some can have several. Temperatures can reach 10,000K at the peak of the blue loop. The exact reasons for blue loops vary in different
Red_supergiant
Star that has a supergiant luminosity class, with a spectral type of F or G
undergo a blue loop, temporarily re-heating and becoming yellow or even blue supergiants before cooling again. Stellar models show that blue loops rely on
Yellow_supergiant
Portion of the giant branch before helium ignition
a blue loop before returning to join the asymptotic giant branch. Stars only a little more massive than 2 M☉ perform a barely noticeable blue loop at
Red-giant_branch
Rare star with tremendous luminosity and high rates of mass loss by stellar winds
away. They may "bounce" backwards and forwards executing one or more "blue loops", still at a fairly steady luminosity, until they explode as a supernova
Hypergiant
Clustering of stars in astronomy diagram
red-giant branch and perform a blue loop. For stars only a little more massive than the sun, around 2 M☉, the blue loop is very short and at a luminosity
Red_clump
Grouping of evolved cool luminous stars
diagram. This is the horizontal branch (for population II stars) or a blue loop for stars more massive than about 2.3 M☉. After the completion of helium
Asymptotic_giant_branch
Bus transit system in State College, PA
The three current routes, Blue/White Loops and Red Link, run during the fall and spring semesters. Only Blue Loop and White Loop run on the summer and operate
Centre Area Transportation Authority
Centre_Area_Transportation_Authority
Type of variable star
supergiants but may still execute a blue loop through the instability strip. The duration and even existence of blue loops is sensitive to the mass, metallicity
Classical_Cepheid_variable
Community area in Chicago, Illinois
The Loop is Chicago's central business district and one of the 77 municipally-designated community areas of Chicago in Illinois, United States. Located
Chicago_Loop
Feature of the Hertzsprung-Russell diagram
Conversely, a star may re-enter the Hertzsprung gap after crossing it in a blue loop event. The location is roughly triangular, though ill-defined at the edges
Hertzsprung_gap
Stage of stellar evolution
stars. They vary in temperature during core helium fusion and perform a blue loop before moving to the asymptotic giant branch. Stars more massive than
Horizontal_branch
Segment of the Chicago "L"
The Loop (historically Union Loop) is the 1.79-mile-long (2.88 km) circuit of elevated rail that forms the hub of the Chicago "L" system in the United
The_Loop_(CTA)
Hypothetical astronomical object
In loop quantum gravity theory, a Planck star is a hypothetical astronomical object, theorized as a compact, exotic star, that exists within a black hole's
Planck_star
Brightest star in the constellation Lepus
contracting and heating up in the latter phases of stellar evolution, in a blue loop. USS Arneb (AKA-56) was a ship of the United States Navy. van Leeuwen
Alpha_Leporis
Animated children's television series for PBS Kids
centers on Lyla Loops (a 7-year-old young Jamaican-American girl), her sidekick Stu (a fuzzy blue hyrax-like creature), and the rest of the Loops family. The
Lyla_in_the_Loop
Hot, giant star of early spectral type
Giants Red giants Blue giants Bright giants Supergiants Red supergiant Hypergiants absolute magni- tude (MV) In astronomy, a blue giant is a hot star
Blue_giant
Astronomical category of stars
Binary stars with highly variable emission and stellar spectral type Fe a blue supergiant with a forest of forbidden FeII lines in its spectrum. The term
Iron_star
Hypothetical class of star that develops from a red dwarf
A blue dwarf is a hypothetical class of star that develops from a red dwarf after it has exhausted much of its hydrogen fuel supply. Because red dwarfs
Blue_dwarf_(red-dwarf_stage)
Star of relatively small size and low luminosity
main-sequence stars. Blue (type O and type B) main sequence stars are so large that they are difficult to distinguish from blue giant stars, either in
Dwarf_star
2012 film by Rian Johnson
Segan as Kid Blue Piper Perabo as Suzie Summer Qing as Old Joe's wife Jeff Daniels as Abe Pierce Gagnon as Cid Garret Dillahunt as Jesse Looper was written
Looper_(film)
Australia and Vekoma's Blue Hawk at Six Flags Over Georgia. A Finnish loop consists of a twisted dive followed by a vertical loop. It was first used by
List of roller coaster elements
List_of_roller_coaster_elements
Binary star in the constellation Scorpius
initial mass of 15 to 16 M☉, or the possibility that Antares is on a blue loop with an initial mass of 13 M☉ (while excluding 14 M☉ as a possible mass
Antares
Type of star that is massive and luminous
Virginis variables such as W Virginis itself, stars that are executing a blue loop triggered by thermal pulsing. A very small number of Mira variables and
Supergiant
Main sequence star that is more luminous and bluer than expected
A blue straggler is a type of star that is more luminous and bluer than expected. Typically identified in a stellar cluster, they have a higher effective
Blue_straggler
State highway loops in Texas are owned and maintained by the Texas Department of Transportation (TxDOT). Loop 105 is the old route of US 87 through Thomaston
List of state highway loops in Texas (100–199)
List_of_state_highway_loops_in_Texas_(100–199)
Stellar classification distinguished by bright blue luminosity
Red dwarfs Subdwarfs Main sequence ("dwarfs") Subgiants Giants Red giants Blue giants Bright giants Supergiants Red supergiant Hypergiants absolute magni-
B-type_main-sequence_star
Type of star larger than main-sequence but smaller than a giant
called the first crossing since they may cross the strip again later on a blue loop. In the 2 – 3 M☉ range, this includes Delta Scuti variables such as β
Subgiant
Stellar classification
outer layers and become hotter again, sometimes going through a number of blue loops before finally reaching the Wolf–Rayet stage. The more-massive stars,
O-type_star
Dim, low mass stars on the main sequence
type for trillions of years, until its fuel is depleted and it turns into a blue dwarf. Because of the comparatively short age of the universe, no red dwarfs
Red_dwarf
Programming idiom
In computer programming, an infinite loop (or endless loop) is a sequence of instructions that, as written, will continue endlessly, unless an external
Infinite_loop
Binary star system in the constellation Leo
parsecs from Earth, or 1,270 light years away. It is believed to be in a blue loop phase. Eta Leonis is apparently a multiple star system, but the number
Eta_Leonis
Visualization of variable interrelationships
link, represented by the bottom blue arrow. The causal effect between these variables forms a positive reinforcing loop, represented by the green arrow
Causal_loop_diagram
Galaxy in the constellation Crater
categorized it as a satellite galaxy, because of the presence of a handful of blue loop stars and a sparsely populated red clump; the existence of some of these
Laevens_1
5-mile footpath in Sheffield, England
Tinsley Canal towpath as a 8-mile (13 km) circular walk known as the Blue Loop. The walk links with the Upper Don Walk at Lady's Bridge. Map all coordinates
Five_Weirs_Walk
Changes to stars over their lifespans
Lyrae variables), whereas some become even hotter and can form a blue tail or blue hook to the horizontal branch. The morphology of the horizontal branch
Stellar_evolution
Wisconsin recreational trail
five loops available for use. The Yellow Loop is one and a half miles (2.4 km) long. No pets are allowed on this loop. The Green and Blue Loops are both
Raven_Trail
Large self-illuminated object in space
Coronal loops are arching magnetic field flux lines that rise from a star's surface into the star's outer atmosphere, its corona. The coronal loops can be
Star
Classification of stars based on spectral properties
3345C. doi:10.1088/0004-6256/137/2/3345. ISSN 0004-6256. S2CID 15376964. Looper, Dagny L.; Kirkpatrick, J. Davy; Cutri, Roc M.; Barman, Travis; Burgasser
Stellar_classification
Chicago "L" station
Jackson is an 'L' station on the CTA's Blue Line, located in the Loop. Like the rest of the Milwaukee-Dearborn subway (excluding Clinton), the station
Jackson station (CTA Blue Line)
Jackson_station_(CTA_Blue_Line)
Public joint venture
full-time employees before being acquired in June 2013 by Cincinnati-based Blue Loop Capital. Other successful companies that have been a part of Ruta N's
Ruta_N
hottest stars List of coolest stars List of Wolf-Rayet stars List of luminous blue variable stars List of O-type stars List of brown dwarfs List of white dwarfs
Lists_of_stars
Type of star that is luminous, blue, and variable in brightness
Luminous blue variables (LBVs) are rare, massive, evolved stars that show unpredictable and sometimes dramatic variations in their spectra and brightness
Luminous_blue_variable
Class of massive star with a spectral type of A to K
supergiants may execute multiple "blue loops", shedding much of their atmosphere, but without actually ever reaching the blue supergiant stage, each one taking
Yellow_hypergiant
Breakfast cereal made by WK Kellogg Co
Froot Loops in 1963. Originally, there were only red, orange and yellow loops; green, blue and purple loops were added during the 1990s, with blue being
Froot_Loops
Outer region of the volume of a star
""Beyond the Blue Horizon" – A Total Solar Eclipse Chase". 1999-08-05. Retrieved 2010-05-21. On ordinary days, the corona is hidden by the blue sky, since
Stellar_atmosphere
Chicago "L" rapid transit line
and one immediately west of downtown.) The Blue Line also has two in-system transfers (both in the Loop), and does not share tracks with any other 'L'
Blue_Line_(CTA)
Brightness of a celestial object observed from the Earth
20th century and older orthochromatic (blue-sensitive) photographic film, the relative brightnesses of the blue supergiant Rigel and the red supergiant
Apparent_magnitude
Continuous band of stars that appears on plots of stellar color versus brightness
Red dwarfs Subdwarfs Main sequence ("dwarfs") Subgiants Giants Red giants Blue giants Bright giants Supergiants Red supergiant Hypergiants absolute magni-
Main_sequence
Star in the constellation Centaurus
cooled so it lies at the blue edge of the Cepheid instability strip. It is expected to get no cooler and may perform a blue loop while slowly increasing
V810_Centauri
Star not gravitationally bound to any galaxy
Since then, several other anisotropies at other wavelengths – including blue and x-ray – have been detected with other space telescopes and they are now
Intergalactic_star
Stellar explosions that appear to be supernovae
Type V supernovae, Eta Carinae analogs, and giant eruptions of luminous blue variables (LBV). Supernova impostors appear as remarkably faint supernovae
Supernova_impostor
Substellar object
Emily L.; Faherty, Jacqueline K.; Cruz, Kelle L.; Van Gordon, Mollie M.; Looper, Dagny L. (September 2015). "Fundamental Parameters and Spectral Energy
Brown_dwarf
Layer of a star's atmosphere
these cool loops in detail from the observations taken with the EUV spectrometer on Skylab in 1976. When the plasma temperature of these loops becomes coronal
Chromosphere
Blue star with strong helium lines
A helium star is a class O or B star (blue), which has extraordinarily strong helium lines and weaker than normal hydrogen lines, indicating strong stellar
Helium_star
Rapid transit system in Chicago, Illinois
existing Blue Line subway at its north and south ends, making possible the "Blue Line loop", envisioned as an underground counterpart to the Loop elevated
Chicago_"L"
American entrepreneur and musician
donating computers to local Colombian schools. Yuxi Pacific was acquired by Blue Loop Capital in June 2013 for an undisclosed amount of cash. Following the
Michael_Puscar
Type of star, larger and brighter than the Sun
Red dwarfs Subdwarfs Main sequence ("dwarfs") Subgiants Giants Red giants Blue giants Bright giants Supergiants Red supergiant Hypergiants absolute magni-
Giant_star
Main-sequence star of spectral type O
Red dwarfs Subdwarfs Main sequence ("dwarfs") Subgiants Giants Red giants Blue giants Bright giants Supergiants Red supergiant Hypergiants absolute magni-
O-type_main-sequence_star
Young stars of spectral types A and B
scattered from disk light relatively increases – it is the same effect as the blue color of our sky). Analogs of Herbig Ae/Be stars in the smaller mass range
Herbig_Ae/Be_star
Red giant star in the cluster M67
unlikely circumstances, it could smoothly ignite helium and become a blue loop star. After that, it will certainly enter the asymptotic giant branch
Sand_364
Star in the constellation Carina
the third time, cooling as it evolves towards a red supergiant after a blue loop. van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction",
HD_84810
Wide-band photometric system used in astronomy
The UBV photometric system (from Ultraviolet, Blue, Visual), also called the Johnson system (or Johnson-Morgan system), is a photometric system usually
UBV_photometric_system
Winter sports resort in Auvergne-Rhône-Alpes, France
point offers a 1.5-kilometer green loop, a 5-kilometer blue loop, a 9-kilometer red loop, and a 17-kilometer black loop. At the resort, three trails (squirrel
Chalmazel_Ski_Resort
American police procedural drama television series (2010–2024)
Out Blue Bloods". Looper. Archived from the original on November 6, 2023. Retrieved November 6, 2023. Ori, Jack (March 6, 2025). "The Secret to Blue Bloods'
Blue_Bloods
Star of luminosity class VI under the Yerkes spectral classification system
Red dwarfs Subdwarfs Main sequence ("dwarfs") Subgiants Giants Red giants Blue giants Bright giants Supergiants Red supergiant Hypergiants absolute magni-
Subdwarf
Calculated property of a star or planet
standards—red M stars that radiate heavily in the infrared to the very hot blue O stars that radiate largely in the ultraviolet. Various colour-effective
Effective_temperature
The work loop technique is used in muscle physiology to evaluate the mechanical work and power output of skeletal or cardiac muscle contractions via in
Work_loop
adjacent to the loop. Overnight the 307 Bathurst Blue Night and 363 Ossington Blue Night buses use the loop as their southern terminus. The loop opened in 1996
Toronto streetcar system loops
Toronto_streetcar_system_loops
Toxin found in black mambas
from most 3FTx proteins in having an elongated second loop and shortened first and third loops. Mambalgins have relatively low sequence similarity to
Mambalgins
Variable star in the constellation Carina
post-red supergiant star, either evolving towards a Wolf–Rayet star or on a blue loop before returning to a cooler temperature. Van Leeuwen, F. (2007). "Validation
HD_96919
Star in the constellation Camelopardalis
enhancement. W Virginis variables are thought to be AGB stars executing a blue loop due to a thermal pulse from the helium burning shell. These stars cross
RU_Camelopardalis
Toronto Transit Commission streetcar terminus
Exhibition Loop is the terminus for the 509 Harbourfront and 511 Bathurst streetcar routes, the 174 Ontario Place-Exhibition, and the 307 Blue Night Bathurst
Exhibition_Loop
Variable star in the constellation Leo
to hotter temperatures, being in the evolutionary stage known as the blue loop. This is an enormous star with about 20 times the Sun's mass (M☉) and
Rho_Leonis
American infrastructure and tunneling company
California. In 2021, TBC completed the Las Vegas Convention Center (LVCC) Loop, a three-station transportation system with 1.7 miles (2.7 km) of tunnels
The_Boring_Company
Cloth insignia worn on the shoulder of a uniform
shoulder loops worn on the shoulder straps to indicate the program level. Webelos Scouts wearing tan uniforms and all Cub Scout leaders wear blue loops, Boy
Shoulder_mark
Variable star in the constellation Puppis
evolving towards cooler temperatures for the second time after performing a blue loop. The third crossing of the instability strip occurs much more slowly than
RS_Puppis
Star in the constellation Lacerta
with a projected rotational velocity of 28 km/s. It is believed to be a blue loop star that has already spent time as a red supergiant after fusing the
4_Lacertae
Subdwarf star with spectral type B
subluminous blue stars around the north galactic pole. In the Palomar-Green survey, they were discovered to be the most common kind of faint blue star with
Subdwarf_B_star
Type of variable stars
branch (AGB), W Vir stars undergoing hydrogen or helium shell burning on a blue loop, and RV Tau stars being post-AGB objects at or near the end of nuclear
Type_II_Cepheid
Scottish actor, producer, director, writer and presenter (born 1965)
received a Tony Award for Best Musical as a producer of the musical A Strange Loop. In 2025, Cumming was awarded a law doctorate by the University of St Andrews
Alan_Cumming
Magnetic field generated inside a star
creates starspots on the surface, and the related phenomenon of coronal loops. A star's magnetic field can be measured using the Zeeman effect. Normally
Stellar_magnetic_field
Bookkeeping survey of stars
temperature is usually shown using the letter codes O B A F G K M running from 'blue' (type O, actually bluish white) through white (type F) to 'red' (type M
Star_count
Japanese light novel series and its adaptations
7th Time Loop: The Villainess Enjoys a Carefree Life Married to Her Worst Enemy! is a Japanese light novel series written by Touko Amekawa. The series
7th_Time_Loop
Chicago "L" station
as arriving station (first blue line station in the loop). RTA. Retrieved 2 August 2011 Media related to Addison (CTA Blue Line) at Wikimedia Commons
Addison station (CTA Blue Line)
Addison_station_(CTA_Blue_Line)
Colorado Scenic and Historic Byway
2002. The Lariat Loop connects to the Mount Blue Sky Scenic Byway via Jefferson County Road 66 (formerly Squaw Pass Road). The Lariat Loop Byway blends natural
Lariat Loop Scenic and Historic Byway
Lariat_Loop_Scenic_and_Historic_Byway
American electronic musician and YouTuber
his legal name: Marc Rebillet, Europe, and Loop Daddy III; two extended play records (Loop Daddy and Loop Daddy II), and three projects under his "leae"
Marc_Rebillet
Coming together of two stars
With this new technology, astronomers discovered that some stars, known as blue stragglers, appeared younger than other stars in the cluster. Astronomers
Stellar_collision
2009 Indian film by Anthony D'Souza
Blue is a 2009 Indian Hindi-language action film co-written and directed by Anthony D'Souza, and produced by Dhilin Mehta under Shree Astavinayak Cine
Blue_(2009_film)
Toronto Transit Commission streetcar station
Humber Loop is a multimodal transit station and a hub for streetcar routes. It consists of two streetcar turning loops and one bus loop. Humber Loop is located
Humber_Loop
150-mile circular walk around London
London Loop became one of his key routes, along with its sister route, the Capital Ring. The route is divided into 24 sections in three groups: the "blue" group
London_Outer_Orbital_Path
Variable star in the constellation Pavo
W Virginis variable, a type II Cepheid thought to be evolving along a blue loop from the thermal pulsing asymptotic giant branch. κ Pav shows sudden small
Kappa_Pavonis
Chicago "L" rapid transit line
elevated and at grade tracks and serves the Southwest Side, running from the Loop to Midway International Airport. As of 2023, an average of 16,979 weekday
Orange_Line_(CTA)
Chicago "L" station
intervals of 2–7 minutes during rush hours, and take 16 minutes to reach the Loop.[citation needed] Belmont station opened in 1970 as part of an extension
Belmont station (CTA Blue Line)
Belmont_station_(CTA_Blue_Line)
Segment of the Chicago "L"
the Chicago "L" system in The Loop, Chicago, Illinois. It is 3.85 mi (6.20 km) long and forms the central part of the Blue Line. As of September 2025, the
Milwaukee–Dearborn_subway
Emily L.; Faherty, Jacqueline; Cruz, Kelle L.; Gordon, Mollie M. Van; Looper, Dagny L. (September 2015). "Fundamental Parameters and Spectral Energy
List_of_red_dwarfs
Astronomical diagram graphing two colour indices
Telescope used SLR in the measurement of redshifts of galaxy clusters. The blue-tip method is closely related to SLR, but was used mainly to correct Galactic
Color–color_diagram
BLUE LOOP
BLUE LOOP
Surname or Lastname
English
English : variant spelling of Bligh.
Boy/Male
Hindu, Indian, Sanskrit
Blue Throated; Blue Necked
Boy/Male
Indian, Sanskrit
Blue Throated; Blue Necked
Boy/Male
Tamil
Blue
Surname or Lastname
English
English : generally a fairly recent Americanized form of German Blau or the French cognate Bleu.
Girl/Female
Hindu
Blue
Girl/Female
Tamil
Neelavathi | நீலாவாதீÂ
Blue
Neelavathi | நீலாவாதீÂ
Boy/Male
Tamil
Blue
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Blue Sky; Blue
Boy/Male
Hindu
Blue, With blue eyes
Boy/Male
Indian, Sanskrit
Blue Throated; Blue Necked
Boy/Male
Irish Gaelic
Blue.
Boy/Male
Tamil
Nilanjan | நீலாஂஜந
Blue, With blue eyes
Nilanjan | நீலாஂஜந
Girl/Female
Persian English French
Blue.
Boy/Male
Hindu
Blue, With blue eyes
Female
Yiddish
(בְּלוּמֶע) Variant form of Yiddish Bluma, BLUME means "flower."
Boy/Male
Native American
Blue.
Boy/Male
Tamil
Blue
Boy/Male
Tamil
Neelanjan | நீலஂஜந
Blue, With blue eyes
Neelanjan | நீலஂஜந
Boy/Male
Irish
Blue.
BLUE LOOP
BLUE LOOP
Boy/Male
Hindu
Boy/Male
Hindu, Indian
Cherry Blossoms of the World
Girl/Female
French American
Lion of God.
Girl/Female
Latin American French Italian
Young.
Boy/Male
Hindu
Expert, Skilled
Girl/Female
Muslim/Islamic
Successful
Girl/Female
Tamil
Vajrakanti | வà¯à®°à®œ காஂதி
Name of a Raga
Boy/Male
Greek
Brother of Agamedes.
Boy/Male
Sikh
Warner, Eyes
Girl/Female
Indian
Single; Directional; Single Route; One Way
BLUE LOOP
BLUE LOOP
BLUE LOOP
BLUE LOOP
BLUE LOOP
superl.
Having the color of the clear sky, or a hue resembling it, whether lighter or darker; as, the deep, blue sea; as blue as a sapphire; blue violets.
n.
Alt. of Blue-bonnet
a.
Having blue eyes.
superl.
Low in spirits; melancholy; as, to feel blue.
n.
See Saunders-blue.
a.
Deep blue, like smalt.
n.
The blue-cheeked honeysucker of Australia.
n.
The European blue titmouse (Parus coeruleus); the bluecap.
a.
Having blue veins or blue streaks.
superl.
Severe or over strict in morals; gloom; as, blue and sour religionists; suiting one who is over strict in morals; inculcating an impracticable, severe, or gloomy mortality; as, blue laws.
superl.
Suited to produce low spirits; gloomy in prospect; as, thongs looked blue.
superl.
Pale, without redness or glare, -- said of a flame; hence, of the color of burning brimstone, betokening the presence of ghosts or devils; as, the candle burns blue; the air was blue with oaths.
v. t.
To make blue; to dye of a blue color; to make blue by heating, as metals, etc.
a.
Dark blue or bluish gray; lead-colored.
a.
Of inflexible honesty and fidelity; -- a term derived from the true, or Coventry, blue, formerly celebrated for its unchanging color. See True blue, under Blue.
a.
Having the blue color of the sky; azure; as, a sky-blue stone.
imp. & p. p.
of Blue