Another example of the Doppler effect that is easy to visualize involves waves on a water surface. For instance, a bug rests on the surface of a puddle. When the bug is stationary, it moves its legs to stay afloat. These disturbances propagate outward from the bug in spherical waves. Whe...
A redshift is a shift in the frequency of an electromagnetic wave caused by an object’s motion. Light from objects moving away from an observer have their light waves shifted toward the red part of the spectrum. Redshift is commonly observed inastronomy, particularly in the observation of ve...
Composed of empty space, vacuum energy is believed to be a key driver of accelerated expansion in the universe. Since vacuum energy density is so similar in nature, it's often interchangeably called dark energy. Another theory, which has been partially disproven, defines dark energy as a new ...
Jason Steffens is an assistant professor of physics and astronomy at the University of Nevada, Las Vegas. What does cosmological redshift do to light? The cosmological redshift is a consequence of the expansion of space. The expansion of space stretches the wavelengths of the light that is trav...
The Einstein Cross, aquasarin thePegasus constellation,according to the European Space Agency(ESA), and is an excellent example of gravitational lensing. The quasar is seen as it was about 11 billion years ago; thegalaxythat it sits behind is about 10 times closer to Earth. Because the two...
what is the Doppler effect? Explain. What is a vibration magnetometer? What is the medium for convection? Identify and describe the steps of the scientific method. What is the spin of photons? Define Lens (astronomy). Define magnification in astronomy. What is a thermocouple? What is thermocou...
The magnetic cycle is believed to be caused by a magnetohydrodynamic (MHD) dynamo process in the solar interior, where the flows and the magnetic fields interact in the strongly turbulent convective zone. The intrinsic features of the solar interior, e.g., the stratification, the turbulence and...
Answer to: What is the difference between a New Frontiers and a discovery NASA mission and which one would be more likely run an astrobiology...
Astrophysics is a branch of space science that applies the laws of physics and chemistry to seek to understand the universe and our place in it.
Astronomy is the scientific study of all objects in space. The word comes to us from the ancient Greek term for "star law." Astrophysics, which is part ofastronomy, goes a step further and applies thelaws of physicsto help us understand the origins of the universe and the objects in it....