Arxiu per Març, 2016

Un exoplaneta amb lava ?

Aquesta seqüència ens mostra un posible escenari del càlid exoplaneta rocós, anomenat 55 Cancri e, que és gairebé dues vegades més gran que la nostra Terra. Les noves dades proporcionades pel telescopi espacial Spitzer de la NASA, mostren canvis de temperatura extrems en un costat o l’altre del planeta…….una posible solució, podría ser la presencia de tolls de lava en la seva superficie.

Aquest planeta està ancorat per les marees de la seva estrella, igual que la Lluna a la Terra, el que significa que una banda sempre crema sota la calor de la seva estrella, mentre que l’altre costat és manté a la foscor. Si el planeta estigués cobert de lava, llavors el costat calent, davant del seu sol tindria fluxos de lava líquida, mentre que el costat fosc i fred, veuria la roca de lava solidificada. La lava endurida seria capaç de transportar la calor a la resta del planeta, el que explica el que ha observat l’Spitzer, el qual ha detectar que el costat fred es molt més fred que el costat calent.

Si realment existeix la lava en aquest planeta, hauria pols calenta fora del mateix, tal com podem observar en aquesta il·lustració, on els vents de l’estrella escampen el material.

Els científics creuen que les futures observacions del Telescopi Espacial James Webb, hauran de proporcionar més detalls respecte a la naturalesa d’aquest exòtic món.

pia20068.jpg

Si voleu més información, premeu aquest enllaç.

No hi ha comentaris

La observació més nítida observada fins ara, d’un disc de pols situat al voltant d’una estrella moribunda.

L’interferòmetre del Very Large Telescope, situat en el Observatori Paranal de l’ESO a Xile, ha obtingut la imatge més nítida observada fins ara, d’un disc de pols situat en una estrella molt vella. Per primera vegada, aquestes estructures poden ser comparades amb aquelles situades al voltant d’estrelles joves i que sorprenentment són similars. Fins i tot, és posible que un disc que apareix al final de la vida d’una estrella, pugui crear una segona generació de planetes.

A mesura que s’acosten al final de les seves vides, les estrelles desenvolupen discos estables de gas i pols al seu voltant. Aquest material és expulsat pels vents estel·lars, mentre que l’estrella va passant de la fase de gegant vermella a una altre fase evolutiva. Però fins ara, els astrònoms no han estat capaços de comparar els dos tipus d’anells, els formats al principi i al final del cicle de la vida estel·lar.

Tot i que molts discos associats a les estrelles joves que són prou a prop nostre, poden ser estudaits en profunditat, cal que corresponguin a estrelles velles amb discos que siguin prou a prop de nosaltres per obtener imatges.

Per aquest motiu, l’equip de recerca liderat per Michael Hillen i Hans Van Winckel, han observat l’estrella doble IRES 08544-4431, situada a uns 4.000 anys llum de la Terra, en la constel·lació austral de Vela. Aquest estel doble, està format per una estrella gegant vermella que expulsa el material al disc de pols que l’envolta i una segona estrella estándar menys evolucionada en òrbita també al seu voltant.

eso1608a.jpg

Si voleu més informació, premeu aquest enllaç.

No hi ha comentaris

Barrancs congelats del pol nord de Plutó

La imatge enregistrada durant el seu pas a prop de Plutó per la sonda New Horizons de la NASA, ens mostra la diversitat de Plutó, amb diferents característiques geològiques i que podem observar en aquest fotografía en color millorat.

Observem llargs i verticals barrancs que transcorren a través de la zona polar, en la regió de Lowell Regio, anomenada així, en honor a Percival Lowell, que va construir l’Observatori Lowell i que va conduir al descobriment del planeta nan. La majoria d’aquests barrancs tenen uns 75 quilòmetres de llargada, mostrant-se subsidiaris entre ell pararel·lament en dirección est-oest i amb uns 10 quilòmetres d’amplada.

Les parets degradades d’aquests barrancs semblen molt més definits que d’altres situats en altres regions de Plutó, probablement per ser més antics i haver estar més erosionats. Aquests barrancs semblen representar un antic període de processos  tectònics.

El color d’aquesta imatge ha estat millorada i contrastada, de manera que les regions altes apareixen en un color groguenc, aquest color s’esvaeix a un gris blavós uniforme en elevacions més baixes. Els mesuraments infrarojos de la New Horizons, mostren que el gel de metà és abundant a Lowell Regio, mentre que hi ha poc gel de nitrogen. Una possibilitat és que els terrenys mostrats en color groguenc poden correspondre a dipòsits de metà de més edat, produïts per la radiació solar exposada més temps, que no pas en les regions de color gris blavós.

pia20473_modest.jpg

Si voleu més informació, premeu aquest enllaç:

No hi ha comentaris

lexapro success depression tramadol pictures tablets tetracycline in dermatology side effect of the lasix cipro interact with warfarin prednisone flu like symptoms how long until i feel better on synthroid try viagra for free stacking tramadol what will tramadol do to a dogs effects of lisinopril on liver side effects of arimidex vs tamoxifen how long does it take for accutane to start working yahoo itching caused by lisinopril blue dot viagra board levaquin in peg tube dxm while on zoloft ciprofloxacin and cholesterol what are the side effects of stopping lexapro cold turkey fluoxetine pharmacological class tinidazole helicobacter pylori prednisone side effects 7 days how long to lose weight after lexapro can lisinopril affect your vision retinal detachment surgery viagra is it ok to take metformin and clomid at the same time can you take advil and synthroid together cialis and nitrate use doxycycline hyclate or monohydrate what to avoid eating while on accutane lose weight get off metformin what type of pain does tramadol help lipitor and beer interaction between tramadol and alcohol can you take prednisone with neurontin how to increase success of clomid which is the best viagra cialis or levitra nexium france why does amitriptyline help with pain natural viagra in stores is prednisone used for croup most effective dose clomid phenergan extravasation symptoms does viagra have shelf life chemical formula of colchicine orlistat vs hydroxycut zoloft pressure behind eyes doxycycline after ipl positive opk day 12 clomid withdrawal side effects from tramadol delayed rash from amoxicillin ciprofloxacin and cream cheese tetracycline tooth damage phenergan iv uses clomid and low hcg levels i want to get off lipitor can doxycycline make your back hurt can i take alprazolam with lexapro can you use prednisolone acetate ophthalmic suspension for pink eye prednisone dosage 6 5 4 3 2 1 how to get pregnant on synthroid dose of albendazole tab products containing viagra metformin ingredients and side effects tramadol most effective glipizide combined with metformin amoxicillin liquid dosage for kittens can you take amoxicillin and diflucan ciprofloxacin and almond milk amoxicillin bei staphylococcus aureus viagra blood thinning side effects of zoloft first week enteric-coated doxycycline pellets delayed release in tablets die from viagra amitriptyline distribution stopping metformin before surgery effexor withdrawal side effects duration taking 3 zoloft metformin walmart $4 list cipro pill identification zoloft anestesia erythromycin a penicillin therapie borreliose amoxicillin bell's palsy treatment valtrex dose does amoxicillin affect milk supply prednisone fatigue prednisolone uses in pregnancy campylobacter resistance to erythromycin amlodipine viagra effexor side effects extreme fatigue is it safe to use voltaren gel while pregnant tapering down off lexapro can lexapro make you feel jittery accutane prescription london side effects of increased dose of metformin will tramadol show up on a hair drug test real accutane stories is it okay to drink alcohol while taking zoloft nursing implications for propranolol amoxicillin for gram negative folliculitis effexor and soma interactions xenical reviews australia can you take ciprofloxacin with food fluoxetine directions can i drink while taking tetracycline side effects of lexapro 5mg mixing amoxicillin with cold medicine how long does it take for lexapro to work for anxiety tapering off low dose prednisone prednisone and acid reflux doxycycline and stomach bloating rash bactrim allergy diseases treated by flagyl synthroid 125 mg color valium and amitriptyline together what days to take clomid for triplets phenergan with codeine reviews cipro covers what bacteria flu shot and accutane lipitor rash side effects bactrim and heart rate herbal amitriptyline sertraline taken with viagra what is the difference between prednisone and prednisolone man takes to much viagra best-buy-viagra.biz patient information for metformin lexapro costco synthroid fatal dose propranolol out of your system nepalese viagra can you mix adderall and accutane took clomid no side effects side effects of augmentin and prednisone can i take biotin with synthroid what infections do amoxicillin cure mrsa bactrim allergy can you take cipro with lipitor how much tramadol would kill a dog generic pill for plavix lexapro withdrawal webmd how does prednisone help congestion levaquin or augmentin stronger hydrochlorothiazide cause kidney stones tramadol injections for dogs fungsi nexium tablet bactrim und antibabypille can amoxicillin alter a pregnancy test diflucan and joint pain mechanism of action of prednisolone in crohn's disease ciprofloxacin dose in typhoid synthroid given empty stomach pregnancy success rates clomid zoloft concerta combination what not to take while on viagra functions of doxycycline tablets fluoxetine with phentermine zoloft treatment length lipitor ldl cholesterol pedir cialis nexium multivitamin hotel stamatia cipro viagra order europe naproxen and robaxin together does prednisone start working immediately cipro tremors what can too much ventolin do buspar and vitamin b clomid side effects after steroids flagyl reaction in dogs zithromax prilosec interaction how long should you wait to drink after taking zithromax how long to get rid of sinus infection with amoxicillin lisinopril ankle swelling hydralazine and lisinopril dangerous viagra side effects orlistat arabic methotrexate and bactrim interaction is there aspirin or ibuprofen in tramadol ventolin in 3rd trimester lexapro prozac zoloft should i take effexor in morning or evening can you take tamiflu and zithromax ct scan dye metformin seromex fluoxetine addiction how long does it take for ciprofloxacin to work for a uti watch happy birthday viagra doxycycline and flying amoxicillin made me ill buy viagra moscow cipro and tendonitis treatment getting a tattoo on accutane clomid canada pharmacy online side effects of amoxicillin and clavulanate potassium lipitor and memory loss 2012 dialon metformin hcl 850 mg how long should you be on accutane for plavix and drug eluting stents amoxicillin after drinking glyburide and metformin during pregnancy cramping around ovulation on clomid is viagra a prescription drugs telmisartan amlodipine hydrochlorothiazide lasix dosage for edema viagra russian group members zoloft and trazodone treatment options after clomid tramadol and percocet together cost of generic levaquin amoxicillin dosage in poultry apo tetracycline side effects levaquin administration rate doxycycline hyclate blepharitis effexor and breast cancer hot flashes how can tramadol be abused amoxicillin trihydrate while pregnant zithromax in neonates tanning while on synthroid is there an age limit on viagra can you take levitra with alcohol side effects in dogs taking prednisone tigna e diflucan fluoxetine fluoxetine hydrochloride zoloft diarrhea after eating effexor burning feet treating allergies with prednisone should i take clomid in morning or evening sore joints prednisone can you buy viagra without prescriptions in australia does prednisone cure puppp is prevacid safe for babies take wellbutrin with zoloft two courses of accutane diarrhea associated with amoxicillin can get pregnant metformin how does lexapro make you feel can you take tramadol with blood thinners buspar prn anxiety zoloft 50 100 nebulized lasix+hospice does bactrim work for pilonidal cyst metformin and brain tumors generic viagra death propranolol help anxiety amoxicillin and tetracycline for h pylori get valtrex cheap losartan/hydrochlorothiazide sandoz levitra sydney lasix cause dehydration pain in legs from levaquin beer with viagra tramadol 50 mg for fibromyalgia what is 875 mg amoxicillin used for celexa and doxycycline interactions can u drink alcohol while on viagra plavix and aspirin dental cialis adverse reactions lexapro vs prozac for ocd can you take tylenol pm with levaquin synthroid and biotin cipro side effects urine color viagra uk medical specialists erythromycin teeth yellow clomid symptoms ovulation how long to hold metformin before and after contrast false bfp with clomid when do side effects from prednisone go away viagra for cold hands propranolol to treat birthmarks lasix and leg swelling clomid unexplained infertility success metformin vs finasteride tramadol tablet composition effects of amoxicillin while on birth control withdrawal symptoms of stopping tramadol tramadol and fioricet together zoloft medication for bipolar overdose tramadol 50 mg zoloft 50 mg dose ciprofloxacin for turtles how to get nexium out of your system sore skin on accutane ciprofloxacin hcl generic name drug equal to nexium metformin made my period late erythromycin liquid form dosage doxycycline to treat psoriasis what happens when you mix alcohol and fluoxetine clomid day 21 progesterone blood test can you buy flagyl online erythromycin otic solution doxylamine succinate and tamoxifen robaxin cost flagyl dermatology what does amoxicillin liquid look like effects of mixing cialis and viagra will the doctor prescribe me viagra amoxicillin treating abscess mixing phenergan and panadol can i take painkillers with zithromax will flagyl help chlamydia can you take tramadol while on vivitrol benefits of lexapro use amoxicillin clavulansäure dosierung hund buspar pregnancy risks how much does levitra cost at costco levitra and naion clomid acidic can you get arrested for ordering tramadol online apo-tramadol/acet 325/37.5mg side effects how much robitussin with clomid prilosec and amoxicillin effexor withdrawal management lipitor joint pain side effects is viagra bad for 18 year olds male side effects clomid the new viagra bloomberg ciprofloxacin for yeast infections tamoxifen fda approved pepcid with nexium bactrim side effects shaking ibuprofen synthroid interaction does tramadol show up on dot drug test is prednisolone the same as orapred doxycycline and viagra interactions plavix and coumadin therapy what days of cycle to use clomid metformin effective time diarrhea effexor withdrawal prednisone used for cancer cipro and relpax best time to administer metformin flagyl and cipro why take together cialis 10 mg directions metformin in spanish can i take amitriptyline with loratadine ervaring cialis tramadol philippines hydrochlorothiazide equivalent bendroflumethiazide cipro flagyl dark urine clomid ovidrel multiples clomid mood swings treatment nolvadex 20 mg price fertility success with metformin accutane how long till it starts to work prednisone 10mg tab side effects side effects of amoxicillin and prednisone accutane and birth control was ist cialis 20mg can you develop allergies to amoxicillin tramadol withdrawal recipe how does accutane cause joint pain prevacid with food or without is it safe to buy clomid online prednisone poison ivy results cephalexin related to cipro what time of the day do you take zoloft metformin spotting mid cycle bactrim liquid ingredients does cipro cause acid reflux buy cheap viagra from india cost for metformin hydrochlorothiazide and overactive bladder when amoxicillin start working tamoxifen and ssri clomid cancer side effects omeprazole and amitriptyline side effects accidentally took tramadol while pregnant high tolerance to tramadol metformin hydrochloride physicochemical properties alternative medicine to synthroid harga flagyl supp amoxicillin after wisdom teeth what medications not to take with viagra can one drink alcohol while on amoxicillin metformin and acarbose combination how long to get used to metformin amitriptyline hcl elavil acapulco beach cipro nord robaxin black box warning toprol and lipitor signs and symptoms of hydrochlorothiazide started taking zoloft amoxicillin preise can i use voltaren gel on my face accutane faa medical bactrim safety in breastfeeding weird side effects of lexapro ciprofloxacin gram negative bacilli colchicine endocytosis zoloft vision side effects amoxicillin trihydrate vhellox 500 mg what are the negative side effects of metformin inr test for plavix ciprofloxacin and liver enzymes 1700 mg of metformin does doxycycline hyclate have sulfa in it buy cialis get viagra free excessive shedding propecia clomid pressure pain where can i buy amoxicillin for my dog fluoxetine dosage dogs hotel villa cipro booking.com side effects for amoxicillin in toddlers tramadol canine liver is it ok to take amitriptyline and tramadol cialis vs tadalafil generic does tramadol show urinalysis singulair prednisone interaction how long on amoxicillin sinus infection role of doxycycline in acne abilify and fluoxetine side effects can i take tramadol with epilim viagra prednisone interaction zoloft et transpiration generic xenical (orlistat) 60 mg can i take prevacid with plavix medication similar to xenical feeling bad on metformin vermox with alcohol can i take atarax and benadryl ciprofloxacin from wikipedia the free encyclopedia prednisone 40 mg 4 days nolvadex czy clomid diflucan ureaplasma renal scan with lasix mag 3 can cats overdose on amoxicillin flagyl method of action tamoxifen intraperitoneal injection is nexium a statin drug doxycycline and yasmin pill accutane one month wait is ventolin sold over the counter cialis how much to take how often to use ventolin hfa prednisone 10mg tablets what is it for lipitor price in india cialis safety warning xenical orlistat price philippines does plavix and aspirin do the same thing does prednisone cause yeast infection long term side effects viagra use how much amoxicillin is in augmentin 875 which is better cialis or levitra or viagra platelet transfusion and plavix diflucan once a week accutane birth control effectiveness iv bactrim desensitization diflucan at cvs side effects of amoxicillin black stool is viagra over the counter at walgreens taking zoloft with viagra valtrex safe while nursing flagyl for cats side effects prednisolone allergic conjunctivitis metformin cfs why is metformin xr taken at night compare dosage viagra cialis prevacid fast tab side effects prevacid metformin doxycycline sinus infection treatment cat te tine o viagra promethazine with tramadol tamoxifen with clomid ventolin tabs side effects names for fluoxetine how long till prednisone works for allergies krugman viagra and the wealth of nations nolvadex wirkung bodybuilding does zoloft have any long term effects can you drink with viagra doxycycline monohydrate vs doxycycline hyclate prednisolone sperm quality dosage for zithromax z pak does medical cover viagra ventolin hfa bronchitis when should i take a pregnancy test when taking clomid prednisolone croup cough prevacid over the counter recall nolvadex vs clomid testosterone medication similar to flagyl can you take propranolol and melatonin accutane oil production tetracycline hydrochloride wikipedia bruxism fluoxetine clomid morning or night pct new viagra band doxycycline safe with penicillin allergy combination drugs with hydrochlorothiazide viagra mental impotence viagra pills for sale online generic synthroid and hair loss levitra faq can i take zithromax at night doxycycline side effects esophagitis levaquin oral tablet 500 mg can u get high off of tramadol hcl 50mg why avoid dairy when taking cipro stabilität von erythromycin