Muaj pes tsawg exoplanets muaj 2019?

Video: Muaj pes tsawg exoplanets muaj 2019?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Nyob ntawd yog ib qho ntxiv 2,420 muaj peev xwm exoplanets los ntawm Kepler thawj lub hom phiaj tseem tsis tau lees paub, nrog rau 890 los ntawm nws txoj haujlwm "Lub Teeb Thib Ob" thiab 1, 100 los ntawm Kev Hloov Pauv Exoplanet Survey Satellite (TESS) lub hom phiaj.

Thiab cov lus nug yog, muaj pes tsawg tus exoplanets tam sim no?

Txog niaj hnub no, ze li 4,000 exoplanets tau raug tshawb pom thiab suav tias "tau lees paub." Txawm li cas los xij, nyob ntawd muaj ze li ntawm 3,000 lwm "tus neeg sib tw" exoplanet kev tshawb nrhiav uas xav tau kev soj ntsuam ntxiv txhawm rau hais kom paub tseeb seb puas muaj lossis tsis yog exoplanet yog tiag.

Kuj Paub, koj pom exoplanet li cas? Ib txoj kev mus nrhiav exoplanets yog to saib rau "wobbly" hnub qub. Ib lub hnub qub uas muaj cov ntiaj chaw tsis zoo nyob ib puag ncig nws qhov chaw. Los ntawm qhov deb, qhov chaw tawm ntawm qhov chaw no ua rau lub hnub qub saib zoo li nws wobbling. Ib lub ntiaj teb orbiting (pob xiav me me) ua rau lub hnub qub (pob daj daj loj) rau orbit me ntsis tawm ntawm qhov chaw.

Ib yam li ntawd, nws tau nug, NASA nrhiav tau pes tsawg exoplanets?

2014. Nyob rau 26 Lub Ob Hlis 2014, NASA tshaj tawm cov nrhiav pom ntawm 715 tshiab tau txheeb xyuas exoplanets Nyob ib ncig ntawm 305 hnub qub los ntawm Kepler Space Telescope. Cov exoplanets tau pom siv cov txheej txheem txheeb cais hu ua "kev txheeb xyuas los ntawm ntau qhov".

Puas yog Pluto yog exoplanet?

Pluto (Lub npe me me ntiaj teb: 134340 Pluto ) yog lub ntiaj teb dwarf dej khov nyob rau hauv txoj siv Kuiper, lub nplhaib ntawm lub cev dhau ntawm lub orbit ntawm Neptune. Lub ntsiab txhais ntawd tsis suav nrog Pluto thiab reclassified nws raws li ib tug dwarf ntiaj chaw. Nws yog lub cuaj-loj tshaj plaws thiab thib kaum-feem ntau-loj tshaj plaws paub cov khoom ncaj qha orbiting lub hnub.

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Muaj pes tsawg protons neutrons thiab electrons 58 28ni muaj?

Ni-58 muaj atomic tooj ntawm 28 thiab ib tug loj tus naj npawb ntawm 58. Yog li ntawd, Ni-58 yuav muaj 28 protons, 28 electrons, thiab 58-28, los yog 30, neutrons.Ni-60 2+ hom, tus naj npawb ntawm Protons zoo ib yam li hauv nruab nrab Ni-58

Muaj pes tsawg guanine bases puas yog 50 lub hauv paus khub ob txoj hlua DNA 100 bases tag nrho muaj yog tias nws muaj 25 adenine bases?

Yog li, muaj tag nrho ntawm 25 + 25 = 50 adenine thiab thymine hauv tag nrho. Qhov ntawd tawm 100− 50 = 50 seem hauv paus. Nco ntsoov tias cytosine thiab guanine daim ntawv cog lus nrog ib leeg, thiab yog li lawv sib npaug ntawm cov nyiaj. Tam sim no peb tuaj yeem faib los ntawm 2 kom tau txais tus lej ntawm guanine lossis cytosine hauv paus