If you dream of going someplace warm to escape the cold winter weather,a trip to a recently discovered planet would certainly warm you right up.The planet,named
OGLE-TR-56b,has temperatures of more than 3,000°F.“This is the hottest planet we know about,”says Dr Dimitar Sasselov,a scientist who led the discovery team.“It is hot enough to have an iron fog and to rain hot iron droplets(细沫).”
The new planet is 30 times farther away than any planet discovered by scientists
before.It is in the Milky Way(银河)but it is not in our solar(太阳的)system.The new planet moves around a star much like our sun,however scientists discovered the planet by using a new planetsearching method called transit technique.They were able to catch sight of the planet when it moved in front of its star,causing the star's light to dim(变暗).Scientists compare the method to discovering the shadow of a bee flying in front of a searchlight 200 miles away.“We believe the door has been opened wide to go and discover planets like the Earth,”says Sasselov.
1.We can infer from the passage that_________.
A.there is iron on the new planet
B.we could go to the new planet in winter
C.the star could block our view of the new planet
D.scientists are studying the weather
2.The “transit technique”can_____________.
A.help dim the light of a star
B.help scientists with a searchlight
C.help discover a bee on a planet
D.help find a planet moving before its star
3.Which is the best title for the passage?
A.New Planet searching Technique
B.New Distant Discovery
C.Space Searching
D.Dream Planet
-as=1.14×498+
-40=730m
=0.14＜0.15，故γRE取0.75
=42mm≤ζb×h0=198mm
+as’=1.14×498-
+40=410mm
=1025mm2