A Complete Collection of 100000 Whys
Fav十万个为什么
为什么宇宙是暗的？
1、宇宙的膨胀导致星光被红移。随着宇宙不断膨胀，遥远星系的光波长被拉长，能量减弱，变得难以观测。
2、宇宙中的物质分布不均匀。暗物质和暗能量占据了宇宙总质能的95%，它们不发光也不与电磁波相互作用，使得宇宙显得暗淡。
3、宇宙的年龄限制了可见的光源。宇宙大约有138亿年的历史，只有距离较近的星光能够到达地球，而更远的星光还未到达。
4、宇宙中的尘埃和气体吸收了部分星光。星际尘埃和气体可以吸收和散射星光，使得部分区域看起来更加暗淡。
5、观测设备的限制。人类的观测设备有限，无法捕捉到所有微弱的光源，尤其是那些被红移或被吸收的光。
总之，宇宙之所以显得暗，是由于宇宙的膨胀、物质分布不均匀、宇宙年龄有限、星际尘埃吸收以及观测设备的限制等多重因素共同作用的结果。
1. Questo strumento raccoglie una vasta quantità di domande e risposte per rispondere ai vostri dubbi quotidiani.
2. Digitate direttamente le parole chiave della domanda che desiderate cercare nella casella di ricerca qui sopra.
3. I dati di questo strumento sono stati raccolti dal web; se riscontrate degli errori, potete segnalarceli affinché possano essere corretti.
Recommended Tools
![Online Calculation of Stainless Steel Square Tube Weight]()
Online Calculation of Stainless Steel Square Tube Weight
Calculate the weight of stainless steel square tubes online
![Floor usage calculator]()
Floor usage calculator
Help you quickly and accurately calculate the required number of floors
![Tile usage calculator]()
Tile usage calculator
Help you quickly and accurately calculate the required number of tiles
![Respiratory rate calculation]()
Respiratory rate calculation
Can you calculate how many times you have breathed since birth
![CMYK Color Comparison Table]()
CMYK Color Comparison Table
This tool provides CMYK color codes, RGB and CMYK color comparison tables
![Two color mixer]()
Two color mixer
Mix two colors to get a new color!
![XML compression/formatting]()
XML compression/formatting
XML online compression/decompression formatting tool
![Online GIF image decomposition]()
Online GIF image decomposition
An online tool for decomposing GIF images
![HTML/BBB conversion tool]()
HTML/BBB conversion tool
Online HTML and UBB code conversion tool
![Complete List of Festivals]()
Complete List of Festivals
Search online for all holidays of the year
![JSON/GET request string conversion]()
JSON/GET request string conversion
Online JSON and GET request string conversion tool
![Keyboard key testing]()
Keyboard key testing
Online keyboard key failure detection tool
![Length Conversion]()
Length Conversion
Online length conversion tool
![Annualized rate of return calculator]()
Annualized rate of return calculator
Calculate annualized rate of return and interest online
![Online cloud fan]()
Online cloud fan
A cloud fan that is good for everything except for no wind
![Fireworks Game]()
Fireworks Game
Online simulation fireworks game
![RGB/CMYK mutual conversion]()
RGB/CMYK mutual conversion
RGB color and CMYK color conversion tool
![Commercial Loan Calculator]()
Commercial Loan Calculator
An online professional commercial loan calculator with multiple calculation methods suitable for more scenarios.
![Equal video segmentation]()
Equal video segmentation
Divide the video into N equal parts online and download them locally
![Facial Text Editor]()
Facial Text Editor
Online emoji editor
![Hardness reference table]()
Hardness reference table
Online Hardness Comparison Table
![Business tax calculator]()
Business tax calculator
Online business tax calculation tool
![regular expression]()
regular expression
A Comprehensive Guide to Commonly Used Regular Expressions
![Xiaoliuren online calculation]()
Xiaoliuren online calculation
Xiaoliuren (Zhuge Ma Pre class) Online Calculation Tool
粤ICP备2021116614号