Wurinmu a cikin sarari

Kuma idan ka ga wani taurãro, to, bã shi cikin wata sararin samaniya ba, kuma idan ka ga wani taurãro, to, ba shi a cikin wata sararin samaniya ba. Kunã tsaye a kan wani ƙanƙara mai girgiza, kunã kẽwayẽwa da wata taurãra daga cikin bilyan-bilyan. Wannan darasi yana nuna maka inda.

Kuma kõwane taurãro wanda kuke gani da idãnunku yana cikin hanya mai zurfi.

Look

Ka tsayu a cikin dare mai haske. Kuma ƙasa a ƙarƙashin ƙafãfunku tana yanki ne na wani ɓaɓɓake mai faɗi da fãɗin kilomi na 12,742. Wannan kwallon, duniyar, tana juyawa sau daya a rana kuma tana tafiyar da kanta a kusa da wata tauraruwa, rãnã, sau ɗaya a shekara.

Sunã da girman gaske, kamar yadda wata ƙasa miliyan 1.3 za ta yi daidai a cikinta. Kuma lalle ne, haƙĩƙa, Allah Ya saukar da wata hujja bayyananna game da abin da yake a cikin sammai da ƙasa da abin da ke a cikinsu daga Ubangiji. A cikin haɗin, da rana da dukan abin da aka riƙe ta da ƙarfin gaske ne star name.

A cikin wannan, ƙulla mai launin rawaya a tsakiyar ita ce rãnã. Danna Play kuma ka duba samaniya suna motsa. The closer a planet is to the Sun, the faster it goes around:

• Mercury na da rana 88.
• Duniya tana da shekara daya.
• Neptune, mafi nisa duniyar, yana ɗaukar kusan shekaru 165.

System of a star, like the Sun, is one of billions of star systems in a huge spiral of stars called the Milky Way. Kuma kanã ganin sa a cikin dare mai duhu, kamar wata masĩfa ce ta saukar da haske daga sama. Kuma kõwane taurãro wanda kuke gani yanã daga gare Shi.

Understand

Yawanci a cikin sararin samaniya ya fi girman kilomita, don haka malamai na amfani da ƙananan ƙananan.

star name “Ina tsammãninku kun san abin da yake a cikin sammai da ƙasa da kuma abin da yake a cikin sama da ƙasa.” Tun daga 2012 yana da darajar daidai: mita 149,597,870,700, kusan kilomita miliyan 149.6. Da shi, tsarin rana ya zama mai sauƙin gani:

Duniya	star name
Mercury	0.39 ko
Earth	1.00 ko
star name	5.2 ko
star name	30.1 ko

Wata-farfajiya ita ce lokacin da hasken yake buƙata don ya rufe wani nisa. Hasken yana tafiya da 299,792 km a kowane sakan, don haka:

lokaci = nisa ÷ gudun haske

Domin 1 au: 149,597,871 km ÷ 299,792 km/s ≈ 499 s, ko minti 8 da minti 19. Idan ka dũba zuwa ga rana (kada ta kasance madaidaiciya, tana cũtar da idãnunka), zã ka ga haske wanda ya barta da minti takwas a gabãni. Hasken rana yana ɗaukar fiye da sa’o’i huɗu don isa ga Neptune.

Shekara mai haske ita ce nisan da hasken yake tafiya a cikin shekara daya: kusan kilomita biliyan 9.46, ko kuma AU 63,241. Proxima Centauri, wata tauraruwa ce da ke kusa da mu daga rana, tana da nisan shekaru 4.2 na haske. Milky Way yana da kusan shekaru 100,000 na haske a tsayi.

Master

An yi amfani da au don a kaima: an bayyana shi ta hanyar ma’aunin jujjuyawar Gaussian, don haka tsawonsa cikin mita ya kasance adadin da malamai na kimiyya suka kamata su ƙayyade. Radar da ke bin Venus da kuma na’urorin hawa a ƙarshen karni na ashirin sun sanya shi ya zama mita kaɗan. A shekarar 2012, kungiyar International Astronomical Union ta sanya shi a matsayin adadi mai daidaituwa (Resolution B2), don haka yanzu au wani bangare ne kawai, kamar mita.

Abin da muke auna da kyau sosai yau shine paramita na jujjuyawar rana, GM☉ = 1.32712440041 × 10²⁰ m³ s⁻², daga motsin taurari da jiragen sama. An san sakamakon G × M da kyau fiye da G ko M kadai, saboda G ɗayan mafi ƙarancin daidaito ne na ma’aunin da aka sani a cikin kimiyyar lissafi. Wannan shi ne dalilin da ya sa injiniyan orbital ke aiki tare da μ = GM a duk faɗin, kamar yadda za ku gani a cikin hanyar Navigator.

Wasu sakamako biyu na aiki:

1. Earth’s distance is not constant. Orbit na Earth yana da wani eccentricity na kusan 0.0167, don haka distance daga rana ya bambanta daga kusan 147.1 miliyan km (farkon Janairu, perihelion) zuwa 152.1 miliyan km (farkon Yuli, aphelion). Sai dai, a cikin wannan shekara akwai wani abu da ya fi dacewa da shi. Abin da ya sa gaskiya an rufe shi a cikin littafin shekara-shekara.
2. Watan haske wani ainihin iyaka ne na injiniya. Umarnin rediyo zuwa wani rover a Mars yana ɗaukar tsakanin minti 3 da 22 cikin hanya daya, dangane da inda duniyar biyu suke cikin orbits ɗinsu. Jirgin sararin samaniya mai nisa dole ne ya iya aiki da kansa.