Einstein, Albert

 

Developed a model for gravity known as General Relativity, which is the basis for modern physical Cosmology.

Transit- the passage of a celestial body across an observer's meridian,also the passage of a celestial body across the disk of a larger one.

Tombaugh, C. W. - American astronomer and discoverer of Pluto.

White Dwarf- A very small, white star that is the remnant core of a star that has completed fusion in its core.

Isothermal sphere- distribution of matter around galaxies.

Edited July 20, 201510 yr by Mordred

Fraunhofer lines

 

Dark lines in the sun's spectrum which correspond to absorption wavelengths of component elements.

 

( where's the 'i' Mordred ? )

Edited July 20, 201510 yr by MigL

Superior Conjunction- a conjunction that occurs when a planet passes behind the Sun and is on the opposite side of the Sun from the Earth.

Edited July 20, 201510 yr by ACG52

NASA

 

National Aeronautics and Space Administration.

An American civilian agency overseeing the space program and aeronautical research.

Apastron- the point of greatest separation of two stars, such as in a binary star system.

Newton, Isaac:

 

“Nature and Nature's laws lay hid in night:

God said, Let Newton be! and all was light.” Alexander Pope

 

( where's the 'i' Mordred ? )

First letter

 

https://en.m.wikipedia.org/wiki/Singular_isothermal_sphere_profile

First letter

 

https://en.m.wikipedia.org/wiki/Singular_isothermal_sphere_profile

Starting letter was 'F',not 'I'

Cepheid- a pulsating variable star.

Dark matter

 

Postulated, non-luminous, mass distribution about a galaxy to account for its non-Newtonian spin.

Rubin, Vera. The first to formulate Dark Matter with strong evidence based on Galactic rotation curves

American Astronomical Society - Formed in 1899 to enhance and share humanity's scientific understanding of the Universe.

YY Ori star - A type of irregularly variable star

Radiant- a point in the sky from which meteors in a meteor shower seem to originate.

Telesto - A moon of Saturn named for a mythological sea goddess.

Oort Cloud-

a shell of comets that is believed to exist at the outermost regions of our Solar System.

When given a name in the form of Tombough,C.W.do we key on the h in Tombough, or on the W?

Dwarf Planet. A small body orbiting the sun - it must be big enough to be spherical and be in hydrostatic equilibrium but may well not have cleared out local planetesimals; Pluto being the most famous example.

 

I think you follow on the last letter given - ie the W in Tombaugh C W

Terrestrial

 

Earth-like.

Libration- an effect caused by the apparent wobble of the Moon as it orbits the Earth. The Moon always keeps the same side toward the Earth, but due to libration, 59% of the Moon's surface can be seen over a period of time.

Nucleosynthesis

 

The process of creation of elemental nuclei, such as creation of Hydrogen and Helium nuclei in Big Bang nucleosynthesis, and heavier nuclei in stellar and supernova nucleosynthesis.

Solstice -

the time of the year when the Sun appears furthest north or south of the celestial equator. The solstices mark the beginning of the Summer and Winter seasons.

Elongation- The difference between the Moon's and The Sun's longitude.