1.由文章第二段第一句“ Mars is the 1. (four) planet from the sun is our solar system after Mars,”可知火星是太阳系中的第四颗行星,可知答案。 2.由文章第二段中的句子“Its 2. d is 53% as wide as that of the earth.”可知它的直径是地球直径的53%。 3.由文章第二段中的句子“ But...
detectwildfirehotspots.Becausethecamerasareusedinremoteareaswherethereislittleorno electricity,thesystemissolarpoweredandusesmicrowavetransmission(传送),whichdoesn?t requirecables(电缆). Thesystem assists140,000forestrangers,grassland managers,conservationistsand researchersinSichuan.Initsfirstfivemonthsofoperations,i...
tabletsandtelevisions.Isallthisstaringbadfor us?Itmightbe,mainlybecauseaswestareatour devicesweareexposingourselvestobluelight. Bluelightisatypeofelectromagnetic(电磁 的)radiationwithaveryshortwavelengththat producesahighamountofenergy.Whileit?strue thatlightcandamageoureyesundercertaincircumstances,there?snoscientif...
What does it looklike?Mars is the fourth planet from the sun in our solarsystem and is named 31 Mars,the Roman god of war.32 diameter(直径) is53% as_33 as that of theearth. Mars goes around the sun at a distance of about 228million kilometers. You can tell 34 planet is Mars...
Jupiter and Saturnare thought to have formed first and quickly within the first 10 million years of the solar system. In the warmer parts of the disk, closer to the star, rocky planets begin to form. What is the oldest thing in our solar system?
with this thought for the entire day. As per the Hindu religious beliefs, the Moonrise occurring in our solar system is of special importance. Though Moonrise is a natural phenomenon, according to Hindu convictions, it has a special role to play in the observation of some festivals and fasts...
and all the planets in our solar system coalesced from a swirling cloud of gas some 4.8 billion years ago.However, if the rings are made of leftovers from that process, then they'd also be about 4.8 billion years old.The problem is that anything gathering space dust for that long would ...
What does it look like?Mars is the fourth planet from the sun in our solar system(太阳系) and is named after Mars,the Roman god of war Its diameter (直径) is 53% as wide as that of the Earth. Mars goes aroundthe sun at a distance of about 228 million kilometers. You can tell ...
There are eight planets in the solar system. Adwarf planetis a celestial body that: is in orbit around a star has enough mass for its owngravityto give it a round shape hasnotcleared away other objects that lie in or near its orbit ...
our solar system itself is more than 4.5 billion years old, it continues to evolve. So, in a very real sense, we really do live in a new solar system. Each time we explore and discover another unusual object, our place in space gets even more interesting than it is now. Stay tuned!