Videnskab & teknik8. apr. 2017 - kl. 22:40

Banebrydende opdagelse: Jordens lookalike er en vandverden med atmosfæreFor første gang nogensinde har man fundet en jordlignende planet med en atmosfære. Det er dog usikkert, om der findes liv på den brandvarme planet Gliese 1132b

Af:Videnskab.dk

Et internationalt hold af forskere har holdt godt øje med planeten GJ 1132b, siden den blev opdaget i år 2015. Planeten ligner nemlig Jorden, og nu viser det sig også, at den har en atmosfære.

Det er første gang, man finder en atmosfære på en jordlignende planet, skriver bbc.com.

Gliese 1132b, som er planetens fulde navn, er 1,4 gange større end Jorden, og den befinder sig 39 lysår fra os.

Nye observationer tyder på, at planeten er dækket af et tykt lag af enten vand, metan eller en blanding af de to. Det skriver forskere i et nyt studie.

Hvilken atmosfære, der er på planeten, kan være afgørende for, om der kan findes liv. Det er dog højst usandsynligt på GJ 1132b, da den ifølge studiet har en overfladetemperatur på 320 grader celsius.

- Så vidt jeg ved, så er den varmeste temperatur, som liv kan overleve på Jorden, 120 grader celsius. Og det er langt koldere end på denne planet, siger astrofysiker John Southworth fra Keele University, der er hovedforfatter på studiet, til bbc.com.

Selvom GJ 1132b er nogenlunde samme størrelse som Jorden, så er dens stjerne svagere, koldere og langt mindre end vores sol.

Observationerne af GJ 1132b tyder på, at den har en tyk atmosfære, der enten består af damp eller metan.

- En mulighed er, at det er en 'vandverden'’ med en atmosfære af varm damp, siger John Southworth til bbc.com.

Opgaver til teksten om ”Jordens lookalike”:

1. Brainstorm i klassen:

Hvilke ord kender I på dansk om rummet?

Prøv at dele jeres ord ind i undergrupper.

2. Læs teksten.

3. Forklar de 8 ord med blåt:

1. ________________________:________________________________________________________

2. ________________________:________________________________________________________

3. ________________________:________________________________________________________

4. ________________________:________________________________________________________

5. ________________________:________________________________________________________

6. ________________________:________________________________________________________

7. ________________________:________________________________________________________

8. ________________________:________________________________________________________

4. Sammensatte ord.

Hvad betyder ”sammensat ord”?_____________________________________________________________

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Find 5 sammensatte ord i teksten, del dem og skriv, hvad de betyder.

FX: ____ jord ____________ +___lignende____________=__jordlignende________________________

Betyder:____(noget)_som ligner jorden ____________________________________________________

1.____________________ +______________________=_______________________________________

Betyder:______________________________________________________________________________

2.____________________ +______________________=_______________________________________

Betyder:______________________________________________________________________________

3.____________________ +______________________=_______________________________________

Betyder:______________________________________________________________________________

4.____________________ +______________________=_______________________________________

Betyder:______________________________________________________________________________

5.____________________ +______________________=_______________________________________

Betyder:______________________________________________________________________________

5. Morfemdeling:

Del de 12 røde ord i morfemer:

1.__________________:______________ ____________ _____________ ______________ ___________

2.__________________:______________ ____________ _____________ ______________ ___________

3.__________________:______________ ____________ _____________ ______________ ___________

4.__________________:______________ ____________ _____________ ______________ ___________

5.__________________:______________ ____________ _____________ ______________ ___________

6.__________________:______________ ____________ _____________ ______________ ___________

7.__________________:______________ ____________ _____________ ______________ ___________

8.__________________:______________ ____________ _____________ ______________ ___________

9.__________________:______________ ____________ _____________ ______________ ___________

10.__________________:______________ ____________ _____________ ______________ __________

11.__________________:______________ ____________ _____________ ______________ __________

12.__________________:______________ ____________ _____________ ______________ __________

6. Ledsætningskonjunktioner:

Find de 5 ledsætningskonjunktioner i teksten, der står med grønt. Skriv dem, og lav derefter selv en sætninger, hvor du bruger de 5 ledsætningskonjunktioner.

1._______________:______________________________________________________________________

2._______________:______________________________________________________________________

3._______________:______________________________________________________________________

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5._______________:______________________________________________________________________

Skriveopgave 1:

Du er træt af Jorden og vil nu flytte til den nye planet Gliese 1132b.

Skriv, hvad du skal gøre, købe, pakke ned eller bygge, for at tage af sted. (Minimum 5 sætninger)

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2.____________________________________________________________________________________

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8.____________________________________________________________________________________

Skriveopgave 2

Du er lige ankommet til den nye planet Gliese 1132b. Du skriver en e-mail til din ven i Danmark og fortæller om planeten, og om, hvad du laver. (1-3 sider)

Start med at skrive nogle stikord på et papir.

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