The active search for extraterrestrial intelligence is mostly done with what kind of telescope? Any ground based telescope Visible light telescope Ultraviolet telescope Radio telescope Infrared telescope
Stellar evolution
We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.
Red Shift
It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.
1.
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The active search for extraterrestrial intelligence is mostly done with what kind of telescope?
Any ground based telescope
Visible light telescope
Ultraviolet telescope
Radio telescope
Infrared telescope
2.
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In the history of Active SETI, only one signal has ever been detected and was never found to repeat. What is this signal known as?
Voyager signal
Arecibo message
Wow! signal
Lone signal
Pioneer signal
3.
The search for extrasolar planets fall broadly into two categories, what are they?
Lensing and transits
Astrometry and Doppler shifts
Speckle imaging and interferometry
Dust emission and radio bursts
Direct and indirect detection
4.
Saturn's moon Titan is interesting in what regard?
Generates own magnetic field
It has a ring structure
Is not spin locked with Saturn
Titan's atmosphere is thicker than our own
Orbits Saturn in the wrong direction
5.
Saturn's moon Enceladus is unique in what way?
Very active cryovolcanos
Saturn's largest moon
Geologically dormant
Intense magnetic field
Reflects almost no light
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